"Rebuilding webserver-configuration" loop

Rebuilding webserver-configuration happens every 5 minutes for hours, causing nginx and php-fpm reloads. Confirmed by checking the timestamps of the conf files for nginx and php-fpm. Froxlor Installed version:    0.10.10 (DB: 201912100), this installation has been upgraded multiple times. How do I debug this? Nothing relevant in System log. Thanks!
And where would that be please? Don't see anything that fits the behaviour described here   Please paste your /etc/cron.d/froxlor file