$title variable required

since I install rank math and move from yoast I have lost of the problem and I send several tickets but your support actually really awful!!!
You answer the question too late, If there is an answer!!!

However, a new important issue!
Today my site is not loading and it shows a white screen with this message :

$title variable required

in debug file, there is nothing except, the usual messages from rank math(that there is no way to solve these annoying messages)

[26-Nov-2020 08:26:20 UTC] خطای Commands out of sync; you can't run this command now در پایگاه‌داده وردپرس برای دستور SELECT COUNT(DISTINCT claim_id) FROM wp_actionscheduler_actions WHERE claim_id != 0 AND status IN ( 'pending', 'in-progress') ساخته شده توسط shutdown_action_hook, do_action('shutdown'), WP_Hook->do_action, WP_Hook->apply_filters, ActionScheduler_QueueRunner->maybe_dispatch_async_request, ActionScheduler_AsyncRequest_QueueRunner->maybe_dispatch, ActionScheduler_AsyncRequest_QueueRunner->allow, ActionScheduler_Abstract_QueueRunner->has_maximum_concurrent_batches, ActionScheduler_DBStore->get_claim_count

[26-Nov-2020 08:26:20 UTC] خطای Commands out of sync; you can't run this command now در پایگاه‌داده وردپرس برای دستور SELECT a.action_id FROM wp_actionscheduler_actions a WHERE 1=1 AND a.status='pending' AND a.scheduled_date_gmt <= '2020-11-26 08:26:20' ORDER BY a.scheduled_date_gmt ASC LIMIT 0, 5 ساخته شده توسط shutdown_action_hook, do_action('shutdown'), WP_Hook->do_action, WP_Hook->apply_filters, ActionScheduler_QueueRunner->maybe_dispatch_async_request, ActionScheduler_AsyncRequest_QueueRunner->maybe_dispatch, ActionScheduler_AsyncRequest_QueueRunner->allow, ActionScheduler_Store->has_pending_actions_due, ActionScheduler_DBStore->query_actions

[26-Nov-2020 08:26:22 UTC] خطای Commands out of sync; you can't run this command now در پایگاه‌داده وردپرس برای دستور SELECT autoload FROM wp_options WHERE option_name = 'rank_math_notifications' ساخته شده توسط shutdown_action_hook, do_action('shutdown'), WP_Hook->do_action, WP_Hook->apply_filters, MyThemeShop\Notification_Center->update_storage, delete_option

By the way, everything is up to date.be sure!