How to setup nginx config for Websockets?

Question

Nginx

After transferring the site from the open server to ubuntu 18 + Nginx - Websocket server began to issue such messages

ReferenceError: message is not defined at WebSocket.incoming ...

I suspect that the matter is in the Nginx configuration, please tell me how to configure it.
Here is my nginx config (site on laravel)

server {
        listen 80 default_server;
        server_name domen.ru;
        root /usr/share/nginx/html/public;
        index index.php index.html;

        # set max upload size
        client_max_body_size 2G;
        fastcgi_buffers 64 4K;

        access_log /var/log/nginx/http_access.log combined;
        error_log /var/log/nginx/http_error.log;

    location / {
        try_files $uri $uri/ /index.php?$query_string;
    }

...