Format plugin format_tabtopics is not found. Using default format_weeks

• line 118 of /course/format/lib.php: call to debugging()
• line 179 of /course/format/lib.php: call to format_base::get_format_or_default()
• line 35 of /course/format/lib.php: call to format_base::instance()
• line 891 of /lib/pagelib.php: call to course_get_format()
• line 36 of /course/info.php: call to moodle_page->set_course()