Laravel. pusher. Error "App key xxx not in this cluster". Has anyone solved the problem?

Question

Push technologies

Tried running demo chat from here: https://github.com/ammezie/laravel-chat. Everything works, except for websockets (when the page is refreshed, the data is loaded from the server). Registered on https://dashboard.pusher.com/ several times, in different clusters. When I open the site, I see in the console: "Pusher : Error : {"type":"WebSocketError","error":{"type":"PusherError","data":{"code":4001,"message": "App key xxxxxxxxxx not in this cluster. Did you forget to specify the cluster?"}}}". I ran under Windows in OSPanel environment and under Ubuntu, the error is the same. Maybe someone has a working demo link for pusher ( key, secret, cluster ) to try? Or how to smear skis? The data is written in .env, but I tried to duplicate it in broadcasting.php, the essence does not change. Thanks in advance.