Navigation node add_before: Reference node not found participants, options: 12889 12890 12891 12892 12893 13212 13357 13399 13485 13486 13556 13557 13677 13679 13692 13693 13711 13712 13755 13756 13819 13820 13866 13867 13927 13928 13977 13986 14028 14040 14076 14105 home calendar

• line 962 of \lib\navigationlib.php: call to debugging()
• line 4097 of \lib\navigationlib.php: call to navigation_node_collection->add()
• line 400 of \theme\moove\lib.php: call to flat_navigation->add()
• line 282 of \theme\moove\lib.php: call to theme_moove_add_coursesections_to_navigation()
• line 76 of \theme\moove\layout\incourse.php: call to theme_moove_extend_flat_navigation()
• line 1379 of \lib\outputrenderers.php: call to include()
• line 1309 of \lib\outputrenderers.php: call to core_renderer->render_page_layout()
• line 1945 of \lib\setuplib.php: call to core_renderer->header()
• line 258 of \mod\resource\locallib.php: call to bootstrap_renderer->__call()
• line 207 of \mod\resource\locallib.php: call to resource_print_header()
• line 106 of \mod\resource\view.php: call to resource_print_workaround()