From b89a99fe0c6d4090eb5c3d68ec4bf83c88c4c0fe Mon Sep 17 00:00:00 2001
From: Koen Kanters <koenkanters94@gmail.com>
Date: Mon, 23 Jan 2023 20:21:03 +0100
Subject: [PATCH] Fix another `Failed to call 'Frontend' 'stop' `.
 https://github.com/Koenkk/zigbee2mqtt/issues/16317

---
 lib/extension/frontend.ts | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/lib/extension/frontend.ts b/lib/extension/frontend.ts
index 263fe4212..cc8087a1f 100644
--- a/lib/extension/frontend.ts
+++ b/lib/extension/frontend.ts
@@ -85,7 +85,10 @@ export default class Frontend extends Extension {
             client.terminate();
         });
         this.wss?.close();
-        return new Promise((cb: () => void) => this.server.close(cb));
+        /* istanbul ignore else */
+        if (this.server) {
+            return new Promise((cb: () => void) => this.server.close(cb));
+        }
     }
 
     @bind private onRequest(request: http.IncomingMessage, response: http.ServerResponse): void {