Ensure more consistent lovelace config errors (#7755)

src/panels/lovelace/badges/hui-entity-filter-badge.ts

@@ -24,8 +24,8 @@ class EntityFilterBadge extends UpdatingElement implements LovelaceBadge {
   private _oldEntities?: EntityFilterEntityConfig[];
 
   public setConfig(config: EntityFilterBadgeConfig): void {
-    if (!config.entities || !Array.isArray(config.entities)) {
+    if (!config.entities.length || !Array.isArray(config.entities)) {
-      throw new Error("entities must be specified.");
+      throw new Error("Entities must be specified");
     }
 
     if (
@@ -37,7 +37,7 @@ class EntityFilterBadge extends UpdatingElement implements LovelaceBadge {
           Array.isArray(entity.state_filter)
       )
     ) {
-      throw new Error("Incorrect filter config.");
+      throw new Error("Incorrect filter config");
     }
 
     while (this.lastChild) {

src/panels/lovelace/cards/hui-alarm-panel-card.ts

@@ -94,7 +94,7 @@ class HuiAlarmPanelCard extends LitElement implements LovelaceCard {
       !config.entity ||
       config.entity.split(".")[0] !== "alarm_control_panel"
     ) {
-      throw new Error("Invalid card configuration");
+      throw new Error("Invalid configuration");
     }
 
     const defaults = {

src/panels/lovelace/cards/hui-button-card.ts

@@ -85,8 +85,11 @@ export class HuiButtonCard extends LitElement implements LovelaceCard {
   }
 
   public setConfig(config: ButtonCardConfig): void {
+    if (!config.entity) {
+      throw new Error("Entity must be specified");
+    }
     if (config.entity && !isValidEntityId(config.entity)) {
-      throw new Error("Invalid Entity");
+      throw new Error("Invalid entity");
     }
 
     this._config = {

src/panels/lovelace/cards/hui-calendar-card.ts

@@ -83,7 +83,7 @@ export class HuiCalendarCard extends LitElement implements LovelaceCard {
 
   public setConfig(config: CalendarCardConfig): void {
     if (!config.entities?.length) {
-      throw new Error("Entities must be defined");
+      throw new Error("Entities must be specified");
     }
 
     if (!Array.isArray(config.entities)) {

src/panels/lovelace/cards/hui-conditional-card.ts

@@ -28,7 +28,7 @@ class HuiConditionalCard extends HuiConditionalBase implements LovelaceCard {
     this.validateConfig(config);
 
     if (!config.card) {
-      throw new Error("No card configured.");
+      throw new Error("No card configured");
     }
 
     this._element = this._createCardElement(config.card);

src/panels/lovelace/cards/hui-entities-card.ts

@@ -111,6 +111,10 @@ class HuiEntitiesCard extends LitElement implements LovelaceCard {
   }
 
   public setConfig(config: EntitiesCardConfig): void {
+    if (!config || !config.entities.length) {
+      throw new Error("Entities must be specified");
+    }
+
     const entities = processConfigEntities(config.entities);
 
     this._config = config;

src/panels/lovelace/cards/hui-entity-card.ts

@@ -68,8 +68,11 @@ export class HuiEntityCard extends LitElement implements LovelaceCard {
   private _footerElement?: HuiErrorCard | LovelaceHeaderFooter;
 
   public setConfig(config: EntityCardConfig): void {
+    if (!config.entity) {
+      throw new Error("Entity must be specified");
+    }
     if (config.entity && !isValidEntityId(config.entity)) {
-      throw new Error("Invalid Entity");
+      throw new Error("Invalid entity");
     }
 
     this._config = config;

src/panels/lovelace/cards/hui-entity-filter-card.ts

@@ -36,8 +36,8 @@ class EntityFilterCard extends UpdatingElement implements LovelaceCard {
   }
 
   public setConfig(config: EntityFilterCardConfig): void {
-    if (!config.entities || !Array.isArray(config.entities)) {
+    if (!config.entities.length || !Array.isArray(config.entities)) {
-      throw new Error("entities must be specified.");
+      throw new Error("Entities must be specified");
     }
 
     if (
@@ -49,7 +49,7 @@ class EntityFilterCard extends UpdatingElement implements LovelaceCard {
           Array.isArray(entity.state_filter)
       )
     ) {
-      throw new Error("Incorrect filter config.");
+      throw new Error("Incorrect filter config");
     }
 
     this._configEntities = processConfigEntities(config.entities);

src/panels/lovelace/cards/hui-gauge-card.ts

@@ -18,6 +18,7 @@ import { isValidEntityId } from "../../../common/entity/valid_entity_id";
 import "../../../components/ha-card";
 import "../../../components/ha-gauge";
 import type { HomeAssistant } from "../../../types";
+import { UNAVAILABLE } from "../../../data/entity";
 import { findEntities } from "../common/find-entites";
 import { hasConfigOrEntityChanged } from "../common/has-changed";
 import { createEntityNotFoundWarning } from "../components/hui-warning";
@@ -72,12 +73,13 @@ class HuiGaugeCard extends LitElement implements LovelaceCard {
   }
 
   public setConfig(config: GaugeCardConfig): void {
-    if (!config || !config.entity) {
+    if (!config.entity) {
-      throw new Error("Invalid card configuration");
+      throw new Error("Entity must be specified");
     }
     if (!isValidEntityId(config.entity)) {
-      throw new Error("Invalid Entity");
+      throw new Error("Invalid entity");
     }
+
     this._config = { min: 0, max: 100, ...config };
   }
 
@@ -98,6 +100,18 @@ class HuiGaugeCard extends LitElement implements LovelaceCard {
 
     const state = Number(stateObj.state);
 
+    if (stateObj.state === UNAVAILABLE) {
+      return html`
+        <hui-warning
+          >${this.hass.localize(
+            "ui.panel.lovelace.warning.entity_unavailable",
+            "entity",
+            this._config.entity
+          )}</hui-warning
+        >
+      `;
+    }
+
     if (isNaN(state)) {
       return html`
         <hui-warning

src/panels/lovelace/cards/hui-humidifier-card.ts

@@ -66,7 +66,7 @@ export class HuiHumidifierCard extends LitElement implements LovelaceCard {
 
   public setConfig(config: HumidifierCardConfig): void {
     if (!config.entity || config.entity.split(".")[0] !== "humidifier") {
-      throw new Error("Specify an entity from within the humidifier domain.");
+      throw new Error("Specify an entity from within the humidifier domain");
     }
 
     this._config = config;

src/panels/lovelace/cards/hui-light-card.ts

@@ -73,7 +73,7 @@ export class HuiLightCard extends LitElement implements LovelaceCard {
 
   public setConfig(config: LightCardConfig): void {
     if (!config.entity || config.entity.split(".")[0] !== "light") {
-      throw new Error("Specify an entity from within the light domain.");
+      throw new Error("Specify an entity from within the light domain");
     }
 
     this._config = {

src/panels/lovelace/cards/hui-logbook-card.ts

@@ -76,6 +76,10 @@ export class HuiLogbookCard extends LitElement implements LovelaceCard {
   }
 
   public setConfig(config: LogbookCardConfig): void {
+    if (!config.entities.length) {
+      throw new Error("Entities must be specified");
+    }
+
     this._configEntities = processConfigEntities<EntityConfig>(config.entities);
 
     this._config = {

src/panels/lovelace/cards/hui-map-card.ts

@@ -137,9 +137,9 @@ class HuiMapCard extends LitElement implements LovelaceCard {
       throw new Error("Error in card configuration.");
     }
 
-    if (!config.entities && !config.geo_location_sources) {
+    if (!config.entities?.length && !config.geo_location_sources) {
       throw new Error(
-        "Either entities or geo_location_sources must be defined"
+        "Either entities or geo_location_sources must be specified"
       );
     }
     if (config.entities && !Array.isArray(config.entities)) {

src/panels/lovelace/cards/hui-markdown-card.ts

@@ -58,7 +58,7 @@ export class HuiMarkdownCard extends LitElement implements LovelaceCard {
 
   public setConfig(config: MarkdownCardConfig): void {
     if (!config.content) {
-      throw new Error("Invalid Configuration: Content Required");
+      throw new Error("Content required");
     }
 
     if (this._config?.content !== config.content) {

src/panels/lovelace/cards/hui-media-control-card.ts

@@ -213,7 +213,7 @@ export class HuiMediaControlCard extends LitElement implements LovelaceCard {
 
   public setConfig(config: MediaControlCardConfig): void {
     if (!config.entity || config.entity.split(".")[0] !== "media_player") {
-      throw new Error("Specify an entity from within the media_player domain.");
+      throw new Error("Specify an entity from within the media_player domain");
     }
 
     this._config = config;

src/panels/lovelace/cards/hui-picture-card.ts

@@ -48,7 +48,7 @@ export class HuiPictureCard extends LitElement implements LovelaceCard {
 
   public setConfig(config: PictureCardConfig): void {
     if (!config || !config.image) {
-      throw new Error("Invalid Configuration: 'image' required");
+      throw new Error("Image required");
     }
 
     this._config = config;

src/panels/lovelace/cards/hui-picture-elements-card.ts

@@ -62,14 +62,14 @@ class HuiPictureElementsCard extends LitElement implements LovelaceCard {
 
   public setConfig(config: PictureElementsCardConfig): void {
     if (!config) {
-      throw new Error("Invalid Configuration");
+      throw new Error("Invalid configuration");
     } else if (
       !(config.image || config.camera_image || config.state_image) ||
       (config.state_image && !config.entity)
     ) {
-      throw new Error("Invalid Configuration: image required");
+      throw new Error("Image required");
     } else if (!Array.isArray(config.elements)) {
-      throw new Error("Invalid Configuration: elements required");
+      throw new Error("Elements required");
     }
 
     this._config = config;

src/panels/lovelace/cards/hui-picture-entity-card.ts

@@ -69,7 +69,7 @@ class HuiPictureEntityCard extends LitElement implements LovelaceCard {
 
   public setConfig(config: PictureEntityCardConfig): void {
     if (!config || !config.entity) {
-      throw new Error("Invalid Configuration: 'entity' required");
+      throw new Error("Entity must be specified");
     }
 
     if (
@@ -78,7 +78,7 @@ class HuiPictureEntityCard extends LitElement implements LovelaceCard {
       !config.state_image &&
       !config.camera_image
     ) {
-      throw new Error("No image source configured.");
+      throw new Error("No image source configured");
     }
 
     this._config = { show_name: true, show_state: true, ...config };

src/panels/lovelace/cards/hui-picture-glance-card.ts

@@ -86,7 +86,7 @@ class HuiPictureGlanceCard extends LitElement implements LovelaceCard {
       !(config.image || config.camera_image || config.state_image) ||
       (config.state_image && !config.entity)
     ) {
-      throw new Error("Invalid card configuration");
+      throw new Error("Invalid configuration");
     }
 
     const entities = processConfigEntities(config.entities);

src/panels/lovelace/cards/hui-plant-status-card.ts

@@ -68,7 +68,7 @@ class HuiPlantStatusCard extends LitElement implements LovelaceCard {
 
   public setConfig(config: PlantStatusCardConfig): void {
     if (!config.entity || config.entity.split(".")[0] !== "plant") {
-      throw new Error("Specify an entity from within the plant domain.");
+      throw new Error("Specify an entity from within the plant domain");
     }
 
     this._config = config;

src/panels/lovelace/cards/hui-sensor-card.ts

@@ -44,7 +44,7 @@ class HuiSensorCard extends HuiEntityCard {
 
   public setConfig(config: SensorCardConfig): void {
     if (!config.entity || config.entity.split(".")[0] !== "sensor") {
-      throw new Error("Specify an entity from within the sensor domain.");
+      throw new Error("Specify an entity from within the sensor domain");
     }
 
     const { graph, detail, hours_to_show, ...cardConfig } = config;

src/panels/lovelace/cards/hui-stack-card.ts

@@ -42,7 +42,7 @@ export abstract class HuiStackCard<T extends StackCardConfig = StackCardConfig>
 
   public setConfig(config: T): void {
     if (!config || !config.cards || !Array.isArray(config.cards)) {
-      throw new Error("Card config incorrect");
+      throw new Error("Invalid configuration");
     }
     this._config = config;
     this._cards = config.cards.map((card) => {

src/panels/lovelace/cards/hui-thermostat-card.ts

@@ -87,7 +87,7 @@ export class HuiThermostatCard extends LitElement implements LovelaceCard {
 
   public setConfig(config: ThermostatCardConfig): void {
     if (!config.entity || config.entity.split(".")[0] !== "climate") {
-      throw new Error("Specify an entity from within the climate domain.");
+      throw new Error("Specify an entity from within the climate domain");
     }
 
     this._config = config;

src/panels/lovelace/cards/hui-weather-forecast-card.ts

@@ -90,11 +90,11 @@ class HuiWeatherForecastCard extends LitElement implements LovelaceCard {
   }
 
   public setConfig(config: WeatherForecastCardConfig): void {
-    if (!config || !config.entity) {
+    if (!config.entity) {
-      throw new Error("Invalid card configuration");
+      throw new Error("Entity must be specified");
     }
     if (!isValidEntityId(config.entity)) {
-      throw new Error("Invalid Entity");
+      throw new Error("Invalid entity");
     }
 
     this._config = config;

src/panels/lovelace/components/hui-conditional-base.ts

@@ -27,15 +27,15 @@ export class HuiConditionalBase extends UpdatingElement {
     config: ConditionalCardConfig | ConditionalRowConfig
   ): void {
     if (!config.conditions) {
-      throw new Error("No conditions configured.");
+      throw new Error("No conditions configured");
     }
 
     if (!Array.isArray(config.conditions)) {
-      throw new Error("Conditions should be in an array.");
+      throw new Error("Conditions need to be an array");
     }
 
     if (!validateConditionalConfig(config.conditions)) {
-      throw new Error("Conditions are invalid.");
+      throw new Error("Conditions are invalid");
     }
 
     if (this.lastChild) {

src/panels/lovelace/components/hui-warning.ts

@@ -17,7 +17,7 @@ export const createEntityNotFoundWarning = (
     ? hass.localize(
         "ui.panel.lovelace.warning.entity_not_found",
         "entity",
-        entityId
+        entityId || "[empty]"
       )
     : hass.localize("ui.panel.lovelace.warning.starting");
 };

src/panels/lovelace/create-element/create-element-base.ts

@@ -197,7 +197,7 @@ export const tryCreateLovelaceElement = <
     // If domain types is given, we can derive a type from "entity"
     (!domainTypes || !("entity" in config))
   ) {
-    throw new Error("No card type configured.");
+    throw new Error("No card type configured");
   }
 
   const customTag = config.type ? _getCustomTag(config.type) : undefined;
@@ -219,7 +219,7 @@ export const tryCreateLovelaceElement = <
   }
 
   if (type === undefined) {
-    throw new Error("No type specified.");
+    throw new Error("No type specified");
   }
 
   const tag = `hui-${type}-${tagSuffix}`;

src/panels/lovelace/editor/config-elements/hui-button-card-editor.ts

@@ -115,7 +115,7 @@ export class HuiButtonCardEditor extends LitElement
           .label="${this.hass.localize(
             "ui.panel.lovelace.editor.card.generic.entity"
           )} (${this.hass.localize(
-            "ui.panel.lovelace.editor.card.config.optional"
+            "ui.panel.lovelace.editor.card.config.required"
           )})"
           .hass=${this.hass}
           .value=${this._entity}

src/panels/lovelace/editor/config-elements/hui-entity-card-editor.ts

@@ -81,7 +81,7 @@ export class HuiEntityCardEditor extends LitElement
           .label="${this.hass.localize(
             "ui.panel.lovelace.editor.card.generic.entity"
           )} (${this.hass.localize(
-            "ui.panel.lovelace.editor.card.config.optional"
+            "ui.panel.lovelace.editor.card.config.required"
           )})"
           .hass=${this.hass}
           .value=${this._entity}

src/panels/lovelace/editor/config-elements/hui-picture-glance-card-editor.ts

@@ -178,7 +178,7 @@ export class HuiPictureGlanceCardEditor extends LitElement
         </div>
         <ha-entity-picker
           .label="${this.hass.localize(
-            "ui.panel.lovelace.editor.card.generic.entity"
+            "ui.panel.lovelace.editor.card.picture-glance.state_entity"
           )} (${this.hass.localize(
             "ui.panel.lovelace.editor.card.config.optional"
           )})"

src/panels/lovelace/elements/hui-conditional-element.ts

@@ -25,7 +25,7 @@ class HuiConditionalElement extends HTMLElement implements LovelaceElement {
       !Array.isArray(config.elements) ||
       !validateConditionalConfig(config.conditions)
     ) {
-      throw new Error("Error in card configuration.");
+      throw new Error("Invalid configuration");
     }
 
     if (this._elements.length > 0) {

src/panels/lovelace/elements/hui-icon-element.ts

@@ -25,7 +25,7 @@ export class HuiIconElement extends LitElement implements LovelaceElement {
 
   public setConfig(config: IconElementConfig): void {
     if (!config.icon) {
-      throw Error("Invalid Configuration: 'icon' required");
+      throw Error("Icon required");
     }
 
     this._config = { hold_action: { action: "more-info" }, ...config };

src/panels/lovelace/elements/hui-image-element.ts

@@ -26,7 +26,7 @@ export class HuiImageElement extends LitElement implements LovelaceElement {
 
   public setConfig(config: ImageElementConfig): void {
     if (!config) {
-      throw Error("Error in element configuration");
+      throw Error("Invalid configuration");
     }
 
     this._config = { hold_action: { action: "more-info" }, ...config };

src/panels/lovelace/elements/hui-service-button-element.ts

@@ -24,19 +24,17 @@ export class HuiServiceButtonElement extends LitElement
 
   public setConfig(config: ServiceButtonElementConfig): void {
     if (!config || !config.service) {
-      throw Error("Invalid Configuration: 'service' required");
+      throw Error("Service required");
     }
 
     [this._domain, this._service] = config.service.split(".", 2);
 
     if (!this._domain) {
-      throw Error("Invalid Configuration: 'service' does not have a domain");
+      throw Error("Service does not have a service domain");
     }
 
     if (!this._service) {
-      throw Error(
+      throw Error("Service does not have a service name");
-        "Invalid Configuration: 'service' does not have a service name"
-      );
     }
 
     this._config = config;

src/panels/lovelace/elements/hui-state-badge-element.ts

@@ -29,7 +29,7 @@ export class HuiStateBadgeElement extends LitElement
 
   public setConfig(config: StateBadgeElementConfig): void {
     if (!config.entity) {
-      throw Error("Invalid Configuration: 'entity' required");
+      throw Error("Entity required");
     }
 
     this._config = { hold_action: { action: "more-info" }, ...config };

src/panels/lovelace/elements/hui-state-icon-element.ts

@@ -30,7 +30,7 @@ export class HuiStateIconElement extends LitElement implements LovelaceElement {
 
   public setConfig(config: StateIconElementConfig): void {
     if (!config.entity) {
-      throw Error("Invalid Configuration: 'entity' required");
+      throw Error("Entity required");
     }
 
     this._config = {

src/panels/lovelace/elements/hui-state-label-element.ts

@@ -30,7 +30,7 @@ class HuiStateLabelElement extends LitElement implements LovelaceElement {
 
   public setConfig(config: StateLabelElementConfig): void {
     if (!config.entity) {
-      throw Error("Invalid Configuration: 'entity' required");
+      throw Error("Entity required");
     }
 
     this._config = { hold_action: { action: "more-info" }, ...config };

src/panels/lovelace/entity-rows/hui-climate-entity-row.ts

@@ -24,7 +24,7 @@ class HuiClimateEntityRow extends LitElement implements LovelaceRow {
 
   public setConfig(config: EntityConfig): void {
     if (!config || !config.entity) {
-      throw new Error("Invalid Configuration: 'entity' required");
+      throw new Error("Entity must be specified");
     }
 
     this._config = config;

src/panels/lovelace/entity-rows/hui-cover-entity-row.ts

@@ -26,7 +26,7 @@ class HuiCoverEntityRow extends LitElement implements LovelaceRow {
 
   public setConfig(config: EntityConfig): void {
     if (!config) {
-      throw new Error("Configuration error");
+      throw new Error("Invalid configuration");
     }
     this._config = config;
   }

src/panels/lovelace/entity-rows/hui-group-entity-row.ts

@@ -38,7 +38,7 @@ class HuiGroupEntityRow extends LitElement implements LovelaceRow {
 
   public setConfig(config: EntityConfig): void {
     if (!config) {
-      throw new Error("Configuration error");
+      throw new Error("Invalid configuration");
     }
     this._config = config;
   }

src/panels/lovelace/entity-rows/hui-humidifier-entity-row.ts

@@ -21,7 +21,7 @@ class HuiHumidifierEntityRow extends LitElement implements LovelaceRow {
 
   public setConfig(config: EntityConfig): void {
     if (!config || !config.entity) {
-      throw new Error("Invalid Configuration: 'entity' required");
+      throw new Error("Entity must be specified");
     }
 
     this._config = config;

src/panels/lovelace/entity-rows/hui-input-datetime-entity-row.ts

@@ -27,7 +27,7 @@ class HuiInputDatetimeEntityRow extends LitElement implements LovelaceRow {
 
   public setConfig(config: EntityConfig): void {
     if (!config) {
-      throw new Error("Configuration error");
+      throw new Error("Invalid configuration");
     }
     this._config = config;
   }

src/panels/lovelace/entity-rows/hui-input-number-entity-row.ts

@@ -32,7 +32,7 @@ class HuiInputNumberEntityRow extends LitElement implements LovelaceRow {
 
   public setConfig(config: EntityConfig): void {
     if (!config) {
-      throw new Error("Configuration error");
+      throw new Error("Invalid configuration");
     }
     this._config = config;
   }

src/panels/lovelace/entity-rows/hui-input-select-entity-row.ts

@@ -40,7 +40,7 @@ class HuiInputSelectEntityRow extends LitElement implements LovelaceRow {
 
   public setConfig(config: EntitiesCardEntityConfig): void {
     if (!config || !config.entity) {
-      throw new Error("Invalid Configuration: 'entity' required");
+      throw new Error("Entity must be specified");
     }
 
     this._config = config;

src/panels/lovelace/entity-rows/hui-input-text-entity-row.ts

@@ -24,7 +24,7 @@ class HuiInputTextEntityRow extends LitElement implements LovelaceRow {
 
   public setConfig(config: EntityConfig): void {
     if (!config) {
-      throw new Error("Configuration error");
+      throw new Error("Invalid configuration");
     }
     this._config = config;
   }

src/panels/lovelace/entity-rows/hui-lock-entity-row.ts

@@ -25,7 +25,7 @@ class HuiLockEntityRow extends LitElement implements LovelaceRow {
 
   public setConfig(config: EntityConfig): void {
     if (!config) {
-      throw new Error("Configuration error");
+      throw new Error("Invalid configuration");
     }
     this._config = config;
   }

src/panels/lovelace/entity-rows/hui-media-player-entity-row.ts

@@ -51,7 +51,7 @@ class HuiMediaPlayerEntityRow extends LitElement implements LovelaceRow {
 
   public setConfig(config: EntityConfig): void {
     if (!config || !config.entity) {
-      throw new Error("Invalid Configuration: 'entity' required");
+      throw new Error("Entity must be specified");
     }
 
     this._config = config;

src/panels/lovelace/entity-rows/hui-scene-entity-row.ts

@@ -27,7 +27,7 @@ class HuiSceneEntityRow extends LitElement implements LovelaceRow {
 
   public setConfig(config: ActionRowConfig): void {
     if (!config) {
-      throw new Error("Configuration error");
+      throw new Error("Invalid configuration");
     }
     this._config = config;
   }

src/panels/lovelace/entity-rows/hui-script-entity-row.ts

@@ -26,7 +26,7 @@ class HuiScriptEntityRow extends LitElement implements LovelaceRow {
 
   public setConfig(config: ActionRowConfig): void {
     if (!config) {
-      throw new Error("Configuration error");
+      throw new Error("Invalid configuration");
     }
     this._config = config;
   }

src/panels/lovelace/entity-rows/hui-sensor-entity-row.ts

@@ -36,7 +36,7 @@ class HuiSensorEntityRow extends LitElement implements LovelaceRow {
 
   public setConfig(config: SensorEntityConfig): void {
     if (!config) {
-      throw new Error("Configuration error");
+      throw new Error("Invalid configuration");
     }
     this._config = config;
   }

src/panels/lovelace/entity-rows/hui-text-entity-row.ts

@@ -32,7 +32,7 @@ class HuiTextEntityRow extends LitElement implements LovelaceRow {
 
   public setConfig(config: EntitiesCardEntityConfig): void {
     if (!config) {
-      throw new Error("Configuration error");
+      throw new Error("Invalid configuration");
     }
     this._config = config;
   }

src/panels/lovelace/entity-rows/hui-timer-entity-row.ts

@@ -28,7 +28,7 @@ class HuiTimerEntityRow extends LitElement {
 
   public setConfig(config: EntityConfig): void {
     if (!config) {
-      throw new Error("Configuration error");
+      throw new Error("Invalid configuration");
     }
     this._config = config;
   }

src/panels/lovelace/entity-rows/hui-toggle-entity-row.ts

@@ -24,7 +24,7 @@ class HuiToggleEntityRow extends LitElement implements LovelaceRow {
 
   public setConfig(config: EntityConfig): void {
     if (!config) {
-      throw new Error("Configuration error");
+      throw new Error("Invalid configuration");
     }
     this._config = config;
   }

src/panels/lovelace/entity-rows/hui-weather-entity-row.ts

@@ -44,7 +44,7 @@ class HuiWeatherEntityRow extends LitElement implements LovelaceRow {
 
   public setConfig(config: EntitiesCardEntityConfig): void {
     if (!config?.entity) {
-      throw new Error("Invalid Configuration: 'entity' required");
+      throw new Error("Entity must be specified");
     }
 
     this._config = config;

src/panels/lovelace/header-footer/hui-graph-header-footer.ts

@@ -80,9 +80,7 @@ export class HuiGraphHeaderFooter extends LitElement
 
   public setConfig(config: GraphHeaderFooterConfig): void {
     if (!config?.entity || config.entity.split(".")[0] !== "sensor") {
-      throw new Error(
+      throw new Error("Specify an entity from within the sensor domain");
-        "Invalid Configuration: An entity from within the sensor domain required"
-      );
     }
 
     const cardConfig = {

src/panels/lovelace/header-footer/hui-picture-header-footer.ts

@@ -41,7 +41,7 @@ export class HuiPictureHeaderFooter extends LitElement
 
   public setConfig(config: PictureHeaderFooterConfig): void {
     if (!config || !config.image) {
-      throw new Error("Invalid Configuration: 'image' required");
+      throw new Error("Image required");
     }
 
     this._config = config;

src/panels/lovelace/special-rows/hui-attribute-row.ts

@@ -23,13 +23,13 @@ class HuiAttributeRow extends LitElement implements LovelaceRow {
 
   public setConfig(config: AttributeRowConfig): void {
     if (!config) {
-      throw new Error("Configuration error");
+      throw new Error("Invalid configuration");
     }
     if (!config.entity) {
-      throw new Error("Entity not defined");
+      throw new Error("Entity not specified");
     }
     if (!config.attribute) {
-      throw new Error("Attribute not defined");
+      throw new Error("Attribute not specified");
     }
     this._config = config;
   }

src/panels/lovelace/special-rows/hui-button-row.ts

@@ -26,11 +26,11 @@ export class HuiButtonRow extends LitElement implements LovelaceRow {
 
   public setConfig(config: ButtonRowConfig): void {
     if (!config) {
-      throw new Error("Error in card configuration.");
+      throw new Error("Invalid configuration");
     }
 
     if (!config.name) {
-      throw new Error("Error in card configuration. No name specified.");
+      throw new Error("No name specified");
     }
 
     this._config = {

src/panels/lovelace/special-rows/hui-call-service-row.ts

@@ -8,15 +8,15 @@ export class HuiCallServiceRow extends HuiButtonRow {
     const callServiceConfig: CallServiceConfig = config;
 
     if (!callServiceConfig) {
-      throw new Error("Error in card configuration.");
+      throw new Error("Invalid configuration");
     }
 
     if (!callServiceConfig.name) {
-      throw new Error("Error in card configuration. No name specified.");
+      throw new Error("No name specified");
     }
 
     if (!callServiceConfig.service) {
-      throw new Error("Error in card configuration. No service specified.");
+      throw new Error("No service specified");
     }
 
     super.setConfig({

src/panels/lovelace/special-rows/hui-cast-row.ts

@@ -32,7 +32,7 @@ class HuiCastRow extends LitElement implements LovelaceRow {
 
   public setConfig(config: CastConfig): void {
     if (!config || config.view === undefined || config.view === null) {
-      throw new Error("Invalid Configuration: 'view' required");
+      throw new Error("View required");
     }
 
     this._config = {

src/panels/lovelace/special-rows/hui-conditional-row.ts

@@ -9,7 +9,7 @@ class HuiConditionalRow extends HuiConditionalBase implements LovelaceRow {
     this.validateConfig(config);
 
     if (!config.row) {
-      throw new Error("No row configured.");
+      throw new Error("No row configured");
     }
 
     this._element = createRowElement(config.row) as LovelaceRow;

src/panels/lovelace/special-rows/hui-section-row.ts

@@ -19,7 +19,7 @@ class HuiSectionRow extends LitElement implements LovelaceRow {
 
   public setConfig(config: SectionConfig): void {
     if (!config) {
-      throw new Error("Error in card configuration.");
+      throw new Error("Invalid configuration");
     }
 
     this._config = config;

src/panels/lovelace/special-rows/hui-text-row.ts

@@ -16,7 +16,7 @@ class HuiTextRow extends LitElement implements LovelaceRow {
 
   public setConfig(config: TextConfig): void {
     if (!config || !config.name || !config.text) {
-      throw new Error("Invalid Configuration: 'name' and 'text' required");
+      throw new Error("Name and text required");
     }
 
     this._config = config;

src/panels/lovelace/special-rows/hui-weblink-row.ts

@@ -19,7 +19,7 @@ class HuiWeblinkRow extends LitElement implements LovelaceRow {
 
   public setConfig(config: WeblinkConfig): void {
     if (!config || !config.url) {
-      throw new Error("Invalid Configuration: 'url' required");
+      throw new Error("URL required");
     }
 
     this._config = {

src/translations/en.json

@@ -65,7 +65,7 @@
       "unknown": "Unk",
       "unavailable": "Unavai",
       "error": "Error",
-      "entity_not_found": "Entity Not Found"
+      "entity_not_found": "Entity not found"
     },
     "alarm_control_panel": {
       "armed": "Armed",
@@ -1959,8 +1959,8 @@
             "hub": "Connected via",
             "firmware": "Firmware: {version}",
             "unnamed_entry": "Unnamed entry",
-            "device_unavailable": "device unavailable",
+            "device_unavailable": "Device unavailable",
-            "entity_unavailable": "entity unavailable",
+            "entity_unavailable": "Entity unavailable",
             "area": "In {area}",
             "no_area": "No Area"
           },
@@ -2721,7 +2721,8 @@
             },
             "picture-glance": {
               "name": "Picture Glance",
-              "description": "The Picture Glance card shows an image and corresponding entity states as an icon. The entities on the right side allow toggle actions, others show the more information dialog."
+              "description": "The Picture Glance card shows an image and corresponding entity states as an icon. The entities on the right side allow toggle actions, others show the more information dialog.",
+              "state_entity": "State Entity"
             },
             "plant-status": {
               "name": "Plant Status",
@@ -2795,7 +2796,7 @@
           "attribute_not_found": "Attribute {attribute} not available in: {entity}",
           "entity_not_found": "Entity not available: {entity}",
           "entity_non_numeric": "Entity is non-numeric: {entity}",
-          "entity_unavailable": "{entity} is currently unavailable",
+          "entity_unavailable": "Entity is currently unavailable: {entity}",
           "starting": "Home Assistant is starting, not everything may be available yet"
         },
         "changed_toast": {