Hey all, as to expected in this section, I’ve got some trouble 
It appears that once WP Cerber is active the user login from the Homey Theme is broken:
Error: Something wrong happened. If you are not able to login, contact to Website Administrator.
I do not have much further information at this point, but willing to provide anything asked.
Cerber itself shows the login as successful, there is no block, WP debuglog shows nothing regarding that either.
Whats the best approach here?
As for Homey:
https://themeforest.net/item/homey-booking-wordpress-theme/23338013
It’s a booking theme and utilizes another plugin for that: Homey Login Register
It’s all in https://themeforest.net/user/favethemes
Thanks a lot,
Jochen