Can not execute event observer '\local_kopere_dashboard\events\event_observers::process_event'

line 164 of /lib/classes/event/manager.php: call to debugging()
line 75 of /lib/classes/event/manager.php: call to core\event\manager::process_buffers()
line 834 of /lib/classes/event/base.php: call to core\event\manager::dispatch()
line 4552 of /lib/moodlelib.php: call to core\event\base->trigger()
line 2717 of /lib/moodlelib.php: call to complete_user_login()
line 58 of /course/view.php: call to require_login()

Notice: Undefined variable: userid in /var/www/live/moodle/local/custom_service/classes/observer.php on line 8
Course: English primary five Inclusive, Topic: Topic 4

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English primary five Inclusive

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English P5 Inclusivehttps://elearning.reb.rw/adt/English P5/
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Topic 4

Can not execute event observer '\local_kopere_dashboard\events\event_observers::process_event'

line 164 of /lib/classes/event/manager.php: call to debugging()
line 75 of /lib/classes/event/manager.php: call to core\event\manager::process_buffers()
line 834 of /lib/classes/event/base.php: call to core\event\manager::dispatch()
line 3756 of /course/lib.php: call to core\event\base->trigger()
line 286 of /course/view.php: call to course_view()