@julian @leo the same as you, but I get websoket error too
<code>
event.returnValue is deprecated. Please use the standard event.preventDefault() instead. nodebb.min.js:2
WebSocket connection to 'ws://www.example.com/socket.io/1/websocket/-CrTw6VKn9Z6gq04eBj7' failed: Error during WebSocket handshake: Unexpected response code: 502 socket.io.js:2
GET http://www.example.com/404 404 (The Page Not Found.) nodebb.min.js:8
Uncaught Error: Script error for: vendor/async
http://requirejs.org/docs/errors.html#scripterror nodebb.min.js:7
</code>