Rockstor Problems (didn't start at all or GUI Missing/incomplete)

After several days of moving data from/to Rockstor and installing PLEX Rock-On my Rig wan’t start (stays at color strips with “initramfs”. Next time it starts and gives the usual message whith IP where the RockStor UI is reachable.

But trying to reach the UI with chrome gives incomplete UI, rotating cursor and messages like:

Houston, we’ve had a problem.

Unknown internal error doing a GET to /api/pools?page=1&format=json&page_size=15&count=

Trying to mount a samba-share on my mac worked, data seems there but after a short time the shares unmounting.

I’m on RockStor 3.8.14 stable.

What could i do to get back to normal behavior?