Hello.
We have a problem with Moodle 4.1.4, but I think it's probably the change of php 8 version the origin.
With debug mod, I have this message : " Fatal error: Unparenthesized `a ? b : c ? d : e` is not supported. Use either `(a ? b : c) ? d : e` or `a ? b : (c ? d : e)` in /var/www/html/moodle42/moodle/local/userenrols/import_form.php on line 158 "
I had the good syntaxe with parenthesis on this file and now the plugin works well !