做websocket代理，报错failed: Invalid frame header

Question

用http-proxy-middleware做websocket代理，为什么连上之后立刻就中断了，报错failed: Invalid frame header

this.wsUrl = `ws://${location.host}/ctfo-platform-auth/websocket/${ticketId}`
this.ws = new WebSocket(this.wsUrl);
this.ws.onopen = () => {
   console.log("连接已链接...");
};

this.ws.onclose = () => {
   console.log("连接已关闭...");
};

this.ws.onmessage = (res) => {
   console.log("收到服务器内容", res);
};
这个是websocket链接

'/ctfo-platform-auth': {
      target: 'http://***.***.***:****',
      changeOrigin: true,
      xfwd:true,
      ws:true,
      secure:false,
}
这个是代理

请指教，谢谢