Can not execute event observer '\local_edwiserreports\observers\event_observer::user_loggedin'

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 795 of /lib/classes/event/base.php: call to core\event\manager::dispatch()
line 4101 of /lib/moodlelib.php: call to core\event\base->trigger()
line 2297 of /lib/moodlelib.php: call to complete_user_login()
line 50 of /user/profile.php: call to require_login()