From d8501f04eb6fb9853aec8be93af701c928373acd Mon Sep 17 00:00:00 2001
From: Koen Kanters <koenkanters94@gmail.com>
Date: Mon, 16 Jan 2023 19:19:51 +0100
Subject: [PATCH] Fix `Failed to call 'Frontend' 'stop' (TypeError: Cannot read
 properties of null (reading 'clients')` error.
 https://github.com/Koenkk/zigbee2mqtt/issues/16207

---
 lib/extension/frontend.ts | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/lib/extension/frontend.ts b/lib/extension/frontend.ts
index 0e9497aed..263fe4212 100644
--- a/lib/extension/frontend.ts
+++ b/lib/extension/frontend.ts
@@ -80,11 +80,11 @@ export default class Frontend extends Extension {
 
     override async stop(): Promise<void> {
         super.stop();
-        for (const client of this.wss.clients) {
+        this.wss?.clients.forEach((client) => {
             client.send(stringify({topic: 'bridge/state', payload: 'offline'}));
             client.terminate();
-        }
-        this.wss.close();
+        });
+        this.wss?.close();
         return new Promise((cb: () => void) => this.server.close(cb));
     }