Guard setting up config flow for an unsupported domain (#11937)

src/dialogs/config-flow/dialog-data-entry-flow.ts

@@ -377,13 +377,20 @@ class DataEntryFlowDialog extends LitElement {
         step = await this._params!.flowConfig.createFlow(this.hass, handler);
       } catch (err: any) {
         this.closeDialog();
+        const message =
+          err?.status_code === 404
+            ? this.hass.localize(
+                "ui.panel.config.integrations.config_flow.no_config_flow"
+              )
+            : `${this.hass.localize(
+                "ui.panel.config.integrations.config_flow.could_not_load"
+              )}: ${err?.body?.message || err?.message}`;
+
         showAlertDialog(this, {
           title: this.hass.localize(
             "ui.panel.config.integrations.config_flow.error"
           ),
-          text: `${this.hass.localize(
+          text: message,
-            "ui.panel.config.integrations.config_flow.could_not_load"
-          )}: ${err.message || err.body}`,
         });
         return;
       } finally {

src/panels/config/integrations/ha-config-integrations.ts

@@ -30,6 +30,7 @@ import "../../../components/ha-check-list-item";
 import { isComponentLoaded } from "../../../common/config/is_component_loaded";
 import { ConfigEntry, getConfigEntries } from "../../../data/config_entries";
 import {
+  getConfigFlowHandlers,
   getConfigFlowInProgressCollection,
   localizeConfigFlowTitle,
   subscribeConfigFlowInProgress,
@@ -51,7 +52,10 @@ import {
 } from "../../../data/integration";
 import { scanUSBDevices } from "../../../data/usb";
 import { showConfigFlowDialog } from "../../../dialogs/config-flow/show-dialog-config-flow";
-import { showConfirmationDialog } from "../../../dialogs/generic/show-dialog-box";
+import {
+  showAlertDialog,
+  showConfirmationDialog,
+} from "../../../dialogs/generic/show-dialog-box";
 import "../../../layouts/hass-loading-screen";
 import "../../../layouts/hass-tabs-subpage";
 import { SubscribeMixin } from "../../../mixins/subscribe-mixin";
@@ -652,6 +656,19 @@ class HaConfigIntegrations extends SubscribeMixin(LitElement) {
     if (!domain) {
       return;
     }
+    const handlers = await getConfigFlowHandlers(this.hass);
+
+    if (!handlers.includes(domain)) {
+      showAlertDialog(this, {
+        title: this.hass.localize(
+          "ui.panel.config.integrations.config_flow.error"
+        ),
+        text: this.hass.localize(
+          "ui.panel.config.integrations.config_flow.no_config_flow"
+        ),
+      });
+      return;
+    }
     const localize = await localizePromise;
     if (
       !(await showConfirmationDialog(this, {

src/translations/en.json

@@ -2605,6 +2605,7 @@
             "finish": "Finish",
             "submit": "Submit",
             "next": "Next",
+            "no_config_flow": "This integration does not support configuration via the UI. If you followed this link from the Home Assistant website, make sure you run the latest version of Home Assistant.",
             "not_all_required_fields": "Not all required fields are filled in.",
             "error_saving_area": "Error saving area: {error}",
             "created_config": "Created configuration for {name}.",