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Format plugin format_tiles is not found. Using default format_topics

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 3090 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 2556 of /lib/modinfolib.php: call to course_modinfo::instance()
line 2716 of /lib/moodlelib.php: call to get_fast_modinfo()
line 3246 of /lib/moodlelib.php: call to require_login()
line 53 of /mod/resource/view.php: call to require_course_login()