Moi aussi j'ai ce problème. J'ai essayé de changer le modèle de retour à la norme. Voici la sortie une fois mis sur les messages de débogage pour les développeurs.
Coding error detected, it must be fixed by a programmer: Invalid context level of parameter.
Stack trace:
•line 3956 of /lib/accesslib.php: coding_exception thrown
•line 3089 of /lib/accesslib.php: call to get_course_context()
•line 77 of /blocks/online_users/block_online_users.php: call to get_enrolled_sql()
•line 279 of /blocks/moodleblock.class.php: call to block_online_users->get_content()
•line 232 of /blocks/moodleblock.class.php: call to block_base->formatted_contents()
•line 882 of /lib/blocklib.php: call to block_base->get_content_for_output()
•line 934 of /lib/blocklib.php: call to block_manager->create_block_contents()
•line 342 of /lib/blocklib.php: call to block_manager->ensure_content_created()
•line 7 of /theme/splash/layout/general.php: call to block_manager->region_has_content()
•line 627 of /lib/outputrenderers.php: call to include()
•line 585 of /lib/outputrenderers.php: call to core_renderer->render_page_layout()
•line 215 of /calendar/event.php: call to core_renderer->header()
thanks for your time.