Same exceptions here and Amazon Echo not running. Since the Hue Emulation (Alexa and Hue Emulation - No devices discovered) does also not work, my Amazon Echo (2nd gen) is currently out of order 
10:07:58.816 [ERROR] [.io.openhabcloud.internal.CloudClient] - Socket.IO error: {}
io.socket.engineio.client.EngineIOException: websocket error
at io.socket.engineio.client.Transport.onError(Transport.java:71) [245:org.openhab.io.openhabcloud:2.2.0.201711231625]
at io.socket.engineio.client.transports.WebSocket.access$500(WebSocket.java:28) [245:org.openhab.io.openhabcloud:2.2.0.201711231625]
at io.socket.engineio.client.transports.WebSocket$2$5.run(WebSocket.java:150) [245:org.openhab.io.openhabcloud:2.2.0.201711231625]
at io.socket.thread.EventThread$2.run(EventThread.java:80) [245:org.openhab.io.openhabcloud:2.2.0.201711231625]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [?:?]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [?:?]
at java.lang.Thread.run(Thread.java:748) [?:?]
Caused by: java.io.EOFException
at okio.RealBufferedSource.require(RealBufferedSource.java:59) ~[?:?]
at okio.RealBufferedSource.readByte(RealBufferedSource.java:72) ~[?:?]
at okhttp3.internal.ws.WebSocketReader.readHeader(WebSocketReader.java:115) ~[?:?]
at okhttp3.internal.ws.WebSocketReader.processNextFrame(WebSocketReader.java:104) ~[?:?]
at okhttp3.internal.ws.RealWebSocket.readMessage(RealWebSocket.java:97) ~[?:?]
at okhttp3.ws.WebSocketCall.createWebSocket(WebSocketCall.java:152) ~[?:?]
at okhttp3.ws.WebSocketCall.access$000(WebSocketCall.java:41) ~[?:?]
at okhttp3.ws.WebSocketCall$1.onResponse(WebSocketCall.java:97) ~[?:?]
at okhttp3.RealCall$AsyncCall.execute(RealCall.java:126) ~[?:?]
at okhttp3.internal.NamedRunnable.run(NamedRunnable.java:32) ~[?:?]
... 3 more
10:07:58.849 [DEBUG] [.io.openhabcloud.internal.CloudClient] - Socket.IO disconnected
10:07:58.850 [INFO ] [.io.openhabcloud.internal.CloudClient] - Disconnected from the openHAB Cloud service (UUID = 5fb0333b-7154-408a-b2a3-e75247b583a5, base URL = http://localhost:7080)