Format plugin format_tiles is not found. Using default format_singleactivity

• line 137 of /course/format/classes/base.php: call to debugging()
• line 198 of /course/format/classes/base.php: call to core_courseformat\base::get_format_or_default()
• line 38 of /course/format/lib.php: call to core_courseformat\base::instance()
• line 3112 of /lib/modinfolib.php: call to course_get_format()
• line 558 of /lib/modinfolib.php: call to section_info->__construct()
• line 436 of /lib/modinfolib.php: call to course_modinfo->__construct()
• line 2578 of /lib/modinfolib.php: call to course_modinfo::instance()
• line 163 of /mod/glossary/classes/local/concept_cache.php: call to get_fast_modinfo()
• line 279 of /mod/glossary/classes/local/concept_cache.php: call to mod_glossary\local\concept_cache::get_course_concepts()
• line 79 of /filter/glossary/filter.php: call to mod_glossary\local\concept_cache::get_concepts()
• line 163 of /filter/glossary/filter.php: call to filter_glossary->get_all_concepts()
• line 530 of /lib/filterlib.php: call to filter_glossary->filter()
• line 188 of /lib/filterlib.php: call to moodle_text_filter->filter_stage_string()
• line 246 of /lib/filterlib.php: call to filter_manager->apply_filter_chain()
• line 1582 of /lib/weblib.php: call to filter_manager->filter_string()
• line 2788 of /lib/navigationlib.php: call to format_string()
• line 1841 of /lib/navigationlib.php: call to global_navigation->add_course()
• line 2075 of /lib/navigationlib.php: call to global_navigation->load_all_courses()
• line 2828 of /lib/navigationlib.php: call to global_navigation->load_all_categories()
• line 1508 of /lib/navigationlib.php: call to global_navigation->add_course()
• line 4304 of /lib/navigationlib.php: call to global_navigation->initialise()
• line 837 of /lib/pagelib.php: call to settings_navigation->__construct()
• line 967 of /lib/pagelib.php: call to moodle_page->magic_get_settingsnav()
• line 393 of /lib/classes/navigation/views/secondary.php: call to moodle_page->__get()
• line 216 of /lib/classes/navigation/views/secondary.php: call to core\navigation\views\secondary->load_course_navigation()
• line 895 of /lib/pagelib.php: call to core\navigation\views\secondary->initialise()
• line 967 of /lib/pagelib.php: call to moodle_page->magic_get_secondarynav()
• line 122 of /theme/boost_union/layout/drawers.php: call to moodle_page->__get()
• line 1477 of /lib/outputrenderers.php: call to include()
• line 1403 of /lib/outputrenderers.php: call to core_renderer->render_page_layout()
• line 724 of /theme/boost_union/classes/output/core_renderer.php: call to core_renderer->header()
• line 1973 of /lib/setuplib.php: call to theme_boost_union\output\core_renderer->header()
• line 62 of /course/info.php: call to bootstrap_renderer->__call()