CODE EXAMPLE FOR JAVASCRIPT

Uncaught Error: Incompatibile SockJS! Main site uses: "1.0.2", the iframe: "1.0.0".

#add this to your nginx config

location / {
proxy_pass our_server;
proxy_redirect off;
proxy_http_version 1.1;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection "upgrade";
}