服務器websocket連接失敗

如題，生產環境websocket連接失敗，前端報錯：WebSocket connection to 'wss://im.tnshow.com:5260/' failed:

因為原來是可以用的，排除代碼和防火牆安全組的問題。百度一下解決問題方式

location /wss/ {

            proxy_set_header Upgrade $http_upgrade;
            proxy_set_header Connection "upgrade";

   }

仍然沒有解決我的問題，查找后台日志：

2021-05-31 17:35:40,989 ERROR o.t.core.ReadCompletionHandler[284]: server:NULL, client:113.89.3.89:6823, javax.net.ssl.SSLException: Received fatal alert: certificate_unknownjava.nio.HeapByteBuffer[pos=7 lim=7 cap=7]
javax.net.ssl.SSLException: Received fatal alert: certificate_unknown

javax.net.ssl.SSLException: Received fatal alert: 

是因為SSL證書更新，沒有同步到這個項目所致。