After update quiz stopped to function: now we view Error 500, but only in quiz node. IN error.log: [Fri May 25 18:33:57.890348 2018] [fcgid:warn] [pid 21690] [client 184.108.40.206:53528] mod_fcgid: stderr: PHP Fatal error: Call to undefined function opigno_class_app_classes_of_course_that_user_is_part_of() in /var/www/vhosts/domain.it/elearning/profiles/opigno_lms/modules/opigno/opigno_quiz_app/opigno_quiz_app.module on line 1987, referer: http://elearning.domain.it/node/27/take Please help me L.
Could you please visit: http://elearning.domain.it/admin/modules
and search for "Opigno Class app", then make sure that it is enabled ?
If it's not, then enable it and click on "Save" at the bottom of the interface.