From 903f92f94a40cdec52f196f581343fd09241ee8b Mon Sep 17 00:00:00 2001
From: Bram Kragten <mail@bramkragten.nl>
Date: Wed, 8 Apr 2020 15:23:22 +0200
Subject: [PATCH] Update developer-tools-state.js

---
 src/panels/developer-tools/state/developer-tools-state.js | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/panels/developer-tools/state/developer-tools-state.js b/src/panels/developer-tools/state/developer-tools-state.js
index f1f56b963a..e25d156cc7 100644
--- a/src/panels/developer-tools/state/developer-tools-state.js
+++ b/src/panels/developer-tools/state/developer-tools-state.js
@@ -247,6 +247,9 @@ class HaPanelDevState extends EventsMixin(LocalizeMixin(PolymerElement)) {
       return;
     }
     var state = this.hass.states[this._entityId];
+    if (!state) {
+      return;
+    }
     this._state = state.state;
     this._stateAttributes = safeDump(state.attributes);
   }