You will probably need to turn off SSL verify under the tunnel settings

CloseEvent {
  wasClean: true,
  reason: 'keepalive ping timeout',
  code: 1011,
  cancelBubble: false,
  isTrusted: true,
  timeStamp: 0,
  srcElement: WebSocket { extensions: '', protocol: '', url: null, readyState: 2 },
  currentTarget: WebSocket { extensions: '', protocol: '', url: null, readyState: 2 },
  returnValue: true,
  defaultPrevented: false,
  cancelable: false,
  bubbles: false,
  composed: false,
  eventPhase: 2,
  type: 'close',
  NONE: 0,
  CAPTURING_PHASE: 1,
  AT_TARGET: 2,
  BUBBLING_PHASE: 3
}

  let outgoingWebSocket: WebSocket | null = null;
  try {
    let response = await fetch(url, options);
    outgoingWebSocket = response.webSocket;
  } catch (error) {
    console.log(error);
  }

  if (!outgoingWebSocket) {
    throw new Error('WebSocket connection failed');
  }

  outgoingWebSocket.accept();
  return outgoingWebSocket;

constructor(private x: number)