websocket: the client is not using the websocket protocol: upgrade token not found in Connecti...

用nginx转发1Panel管理地址，结果在使用到终端的时候，连接不上，看日志提示出错

websocket: the client is not using the websocket protocol: 'upgrade' token not found in 'Connection' head

这是用nginx转发WebSocket请求时，配置问题，就会出现此问题。

解决办法在转发location中添加

proxy_http_version 1.1;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection upgrade