Script /mod/resource/view.php?id=1594552 mutated the session after it was closed: $SESSION->cachestore_session: default_session-core/navigation_cache,default_session-core/coursecat,default_session-core/navigation_expandcourse,default_session-theme_remui/courses,default_session-core/courseeditorstate
line 807 of /lib/classes/session/manager.php: call to debugging()
line 163 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()