Openhab is buggy after installing HABmin

I have installed openHAB 2 by using the openhabian Raspberry Image. everthing was working fine: I had my Homematic System connected, I was using the mySQL Persistance and was using the MQTT binding. Then I was looking for a new style of user Interface and added the HABmin addon. Since then I am only getting Errors opening the classic, Basic, paper UI. Also the acess via Mobile phone using openHAB for andoid or is no longer working.
I always get the message

“Jersey is not ready yet!”

could you please help me getting openHAB running again without Setting up everything from scratch?