I could fix my issue thanks to this post
I had change my nginx conf for websocket support
location / {
proxy_pass http://localhost:5678;
proxy_http_version 1.1;
proxy_set_header Upgrade $http_upgrade; # websocket support
proxy_set_header Connection "Upgrade"; # websocket support
proxy_set_header Host $host;
chunked_transfer_encoding off;
proxy_buffering off;
proxy_cache off;
}