Unknown Location after MacOS Catalina Update

Hi there, I updated all my devices to the latest OS. iPhone and iPad seems to work fine, but Prey is unable to find the location of my MacBook Pro. It is listed in the device menu and linked … and I also tried via Terminal:

sudo /usr/local/lib/prey/current/bin/prey config hooks set_watcher

Terminal says: Prey monitor is running.

I am sitting here since hours and trying to find a solution, but unfortunately without success.

Any helf would be highly appreciated.