Hook callback definition contains invalid 'callback' class name in 'format_tiles'. Callback class 'format_tiles\hooks\output\before_footer_html_generation' not found.
  • line 226 of /lib/classes/hook/manager.php: call to debugging()
  • line 189 of /lib/classes/hook/manager.php: call to core\hook\manager->is_callback_valid()
  • line 304 of /lib/classes/hook/manager.php: call to core\hook\manager->getListenersForEvent()
  • line 975 of /lib/classes/output/core_renderer.php: call to core\hook\manager->dispatch()
  • line 407 of /login/index.php: call to core\output\core_renderer->footer()