From f54cd18da409bf3dea92dce9752977cfbb22640a Mon Sep 17 00:00:00 2001
From: Bram Kragten <mail@bramkragten.nl>
Date: Thu, 12 Mar 2020 20:09:27 +0100
Subject: [PATCH] Fix resize observer on error card (#5158)

* Fix resize observer on error card

* Update hui-media-control-card.ts
---
 src/panels/lovelace/cards/hui-media-control-card.ts | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/panels/lovelace/cards/hui-media-control-card.ts b/src/panels/lovelace/cards/hui-media-control-card.ts
index 1baef8235a..bd435aa86d 100644
--- a/src/panels/lovelace/cards/hui-media-control-card.ts
+++ b/src/panels/lovelace/cards/hui-media-control-card.ts
@@ -521,7 +521,12 @@ export class HuiMediaControlCard extends LitElement implements LovelaceCard {
       debounce(() => this._measureCard(), 250, false)
     );
 
-    this._resizeObserver.observe(this.shadowRoot!.querySelector("ha-card")!);
+    const card = this.shadowRoot!.querySelector("ha-card");
+    // If we show an error or warning there is no ha-card
+    if (!card) {
+      return;
+    }
+    this._resizeObserver.observe(card);
   }
 
   private _handleMoreInfo(): void {