Can not execute event observer 'block_xp\local\observer\observer::catch_all'

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 4704 of /lib/moodlelib.php: call to core\event\base->trigger()
line 2713 of /lib/moodlelib.php: call to complete_user_login()
line 48 of /user/profile.php: call to require_login()

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