I have just upgraded to Moodle 3.11.1+ (Build: 20210716) with Fordson v3.11 release 1 2021072100.
Fordson simply does not work, nor do its presets.
Boost works all right. So do Moove 3.11.05 2021052100 and Adaptable 3.10.1.2 2021022302.
I solved the problem! I uninstalled and then reinstalled the newer version of fordson. The mistake was that I automatically installed fordson via moodle 3.11 instead of doing it manually!