Script /course/view.php?id=864 mutated the session after it was closed: $SESSION->filter_edusharing_rendering2 $SESSION->cachestore_session: default_session-core/navigation_cache
line 807 of /lib/classes/session/manager.php: call to debugging()
line 185 of /lib/classes/shutdown_manager.php: call to core\session\manager::check_mutated_closed_session()
line ? of unknownfile: call to core_shutdown_manager::shutdown_handler()