Apprtc - Websocket连接失败

Question

我已成功安装并配置AppRTC，Collider，转服务器。 但是我遇到了Websocket错误的问题。 Google Chrome控制台错误如下：

Initializing; server= undefined.
apprtc.debug.js:5583 1.413: Initializing; room=undefined.
apprtc.debug.js:5583 5.209: Opening signaling channel.
apprtc.debug.js:5583 5.390: Got access to local media with mediaConstraints:
'{"audio":true,"video":{"optional":[{"minWidth":"1280"},{"minHeight":"720"}],"mandatory":{}}}'
apprtc.debug.js:5583 5.390: User has granted access to local media.
apprtc.debug.js:5583 5.391: Attaching local stream.
apprtc.debug.js:5092 WebSocket connection to 'wss://104.198.4.111:8089/ws' failed: Error in connection establishment: net::ERR_CONNECTION_REFUSED
(anonymous) @ apprtc.debug.js:5092
apprtc.debug.js:5583 5.578: WebSocket open error: WebSocket error.
apprtc.debug.js:5583 5.584: WebSocket register error: WebSocket error.
apprtc.debug.js:5583 5.636: Joined the room.

以下是WebSocket错误的屏幕截图，我正面临

Collider和AppRTC位于Google VM实例上，我使用了自己的转向服务器，该服务器已在AWS EC2实例上设置。 请帮我解决这个问题。 Google APP engine中是否有任何设置，我部署了APP？

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