Locale warning (not fatal) U_USING_FALLBACK_WARNING: Requested locale "zh_TW.UTF-8" not found, locale "zh@collation=stroke" used instead. The most specific locale supported by ICU relatively to the requested locale is "zh_Hant".

• line 105 of /lib/classes/collator.php: call to debugging()
• line 188 of /lib/classes/collator.php: call to core_collator::ensure_collator_available()
• line 263 of /lib/classes/collator.php: call to core_collator::asort()
• line 113 of /filter/activitynames/classes/text_filter.php: call to core_collator::asort_objects_by_property()
• line 79 of /filter/activitynames/classes/text_filter.php: call to filter_activitynames\text_filter->get_activity_list()
• line 43 of /filter/activitynames/classes/text_filter.php: call to filter_activitynames\text_filter->get_cached_activity_list()
• line 116 of /filter/classes/text_filter.php: call to filter_activitynames\text_filter->filter()
• line 185 of /filter/classes/filter_manager.php: call to core_filters\text_filter->filter_stage_post_clean()
• line 231 of /filter/classes/filter_manager.php: call to core_filters\filter_manager->apply_filter_chain()
• line 240 of /lib/classes/formatting.php: call to core_filters\filter_manager->filter_text()
• line 617 of /lib/weblib.php: call to core\formatting->format_text()
• line 845 of /lib/weblib.php: call to format_text()
• line 70 of /lib/classes/output/activity_header.php: call to format_module_intro()
• line 873 of /lib/pagelib.php: call to core\output\activity_header->__construct()
• line 965 of /lib/pagelib.php: call to moodle_page->magic_get_activityheader()
• line 80 of /theme/boost_magnific/layout/incourse.php: call to moodle_page->__get()
• line 972 of /lib/classes/output/core_renderer.php: call to include()
• line 888 of /lib/classes/output/core_renderer.php: call to core\output\core_renderer->render_page_layout()
• line ? of unknownfile: call to core\output\core_renderer->header()
• line 109 of /lib/classes/output/bootstrap_renderer.php: call to call_user_func_array()
• line 99 of /mod/forum/subscribe.php: call to core\output\bootstrap_renderer->__call()