This page should be using theme mb2cg which cannot be initialised. Nor can the site theme mb2cg. Falling back to boost

line 725 of /lib/outputlib.php: call to debugging()
line 1705 of /lib/pagelib.php: call to theme_config::load()
line 751 of /lib/pagelib.php: call to moodle_page->initialise_theme_and_output()
line 1006 of /lib/pagelib.php: call to moodle_page->magic_get_theme()
line 108 of /index.php: call to moodle_page->get_renderer()

Error

Exception - Class 'core_competency\api' not found

Debug info:
Error code: generalexceptionmessage

Stack trace:

line 3965 of /course/lib.php: Error thrown
line 2995 of /lib/navigationlib.php: call to course_get_user_navigation_options()
line 1455 of /lib/navigationlib.php: call to global_navigation->add_front_page_course_essentials()
line 4295 of /lib/navigationlib.php: call to global_navigation->initialise()
line 832 of /lib/pagelib.php: call to settings_navigation->__construct()
line 962 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 890 of /lib/pagelib.php: call to core\navigation\views\secondary->initialise()
line 962 of /lib/pagelib.php: call to moodle_page->magic_get_secondarynav()
line 70 of /theme/boost/layout/drawers.php: call to moodle_page->__get()
line 1473 of /lib/outputrenderers.php: call to include()
line 1399 of /lib/outputrenderers.php: call to core_renderer->render_page_layout()
line 116 of /index.php: call to core_renderer->header()