Hi all,
myopenhab.org do not work, i can see this issue in the log.
- i have uninstalled from paper ui the Clould connector
- sudo rm -rf /var/lib/openhab2/cache
- sudo rm -rf /var/lib/openhab2/tmp
nothing help 
==> /var/log/openhab2/openhab.log <==
2018-03-25 00:32:23.498 [INFO ] [io.openhabcloud.internal.CloudClient] - Shutting down openHAB Cloud service connection
2018-03-25 00:32:23.547 [INFO ] [io.openhabcloud.internal.CloudClient] - Disconnected from the openHAB Cloud service (UUID = 9b12c415-e90a-42be-85a0-a6d8e06578fb, base URL = http://localhost:8080)
2018-03-25 00:32:24.557 [INFO ] [io.openhabcloud.internal.CloudClient] - Connected to the openHAB Cloud service (UUID = 9b12c415-e90a-42be-85a0-a6d8e06578fb, base URL = http://localhost:8080)
2018-03-25 00:32:24.674 [ERROR] [io.openhabcloud.internal.CloudClient] - Socket.IO error: {}
io.socket.engineio.client.EngineIOException: xhr poll error
at io.socket.engineio.client.Transport.onError(Transport.java:71) [236:org.openhab.io.openhabcloud:2.2.0]
at io.socket.engineio.client.transports.PollingXHR.access$100(PollingXHR.java:19) [236:org.openhab.io.openhabcloud:2.2.0]
at io.socket.engineio.client.transports.PollingXHR$6$1.run(PollingXHR.java:124) [236:org.openhab.io.openhabcloud:2.2.0]
at io.socket.thread.EventThread$2.run(EventThread.java:80) [236:org.openhab.io.openhabcloud:2.2.0]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [?:?]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [?:?]
at java.lang.Thread.run(Thread.java:748) [?:?]
Caused by: java.io.IOException: 400
at io.socket.engineio.client.transports.PollingXHR$Request$1.run(PollingXHR.java:218) ~[?:?]
... 1 more
2018-03-25 00:32:24.721 [INFO ] [io.openhabcloud.internal.CloudClient] - Disconnected from the openHAB Cloud service (UUID = 9b12c415-e90a-42be-85a0-a6d8e06578fb, base URL = http://localhost:8080)
2018-03-25 00:32:25.583 [INFO ] [io.openhabcloud.internal.CloudClient] - Connected to the openHAB Cloud service (UUID = 9b12c415-e90a-42be-85a0-a6d8e06578fb, base URL = http://localhost:8080)
==> /var/log/openhab2/events.log <==
2018-03-25 00:32:27.259 [vent.ItemStateChangedEvent] - lastseen_Gil changed from 2018-03-25T00:31:27.006+0300 to 2018-03-25T00:32:27.242+0300
2018-03-25 00:32:28.591 [vent.ItemStateChangedEvent] - Current_DateTime changed from 2018-03-25T00:31:28.572+0300 to 2018-03-25T00:32:28.575+0300
==> /var/log/openhab2/openhab.log <==
2018-03-25 00:32:42.053 [INFO ] [io.openhabcloud.internal.CloudClient] - Shutting down openHAB Cloud service connection
2018-03-25 00:32:42.080 [INFO ] [io.openhabcloud.internal.CloudClient] - Disconnected from the openHAB Cloud service (UUID = 9b12c415-e90a-42be-85a0-a6d8e06578fb, base URL = http://localhost:8080)
2018-03-25 00:32:47.729 [INFO ] [io.openhabcloud.internal.CloudClient] - Connected to the openHAB Cloud service (UUID = 9b12c415-e90a-42be-85a0-a6d8e06578fb, base URL = http://localhost:8080)
2018-03-25 00:32:49.707 [INFO ] [io.openhabcloud.internal.CloudClient] - Shutting down openHAB Cloud service connection
2018-03-25 00:32:49.724 [INFO ] [io.openhabcloud.internal.CloudClient] - Disconnected from the openHAB Cloud service (UUID = 9b12c415-e90a-42be-85a0-a6d8e06578fb, base URL = http://localhost:8080)
2018-03-25 00:32:49.995 [INFO ] [io.openhabcloud.internal.CloudClient] - Connected to the openHAB Cloud service (UUID = 9b12c415-e90a-42be-85a0-a6d8e06578fb, base URL = http://localhost:8080)
==> /var/log/openhab2/events.log <==```