After 2.2 Update dashboard almost empty

I just updated my OH 2.1 to 2.2 via openhabian-config as instructed. After the update I have some problems:

1.) On the Dashboard at :8080/start/index I see only “REST API” and “OPENHABIAN HELP”, everything else (e.g. PaperUI) is missing

2.) OH stopped working (iOS App shows my sitemap but I cannnot control any device

3.) In the openhab.log I see that my things have been removed (e.g. “2018-01-17 08:43:31.875 [ThingRemovedEvent] - Thing ‘netatmo:netatmoapi:c2410e3e’ has been removed.”

4.) I get a lot of error messages like “[e.californium.scandium.DTLSConnector] - Outbound message queue is full!”

Any ideas on these issues?