В последних записях журнала сайта посмотрел ошибку. Одна из повторяющихся ошибок выглядит вот так:
Drupal\Core\Database\DatabaseExceptionWrapper: SQLSTATE[HY000]: General error: 2006 MySQL server has gone away: INSERT INTO {cache_config} (cid, expire, created, tags, checksum, data, serialized) VALUES (:db_insert_placeholder_0, :db_insert_placeholder_1, :db_insert_placeholder_2, :db_insert_placeholder_3, :db_insert_placeholder_4, :db_insert_placeholder_5, :db_insert_placeholder_6) ON DUPLICATE KEY UPDATE cid = VALUES(cid), expire = VALUES(expire), created = VALUES(created), tags = VALUES(tags), checksum = VALUES(checksum), data = VALUES(data), serialized = VALUES(serialized); Array ( [:db_insert_placeholder_0] => field.settings [:db_insert_placeholder_1] => -1 [:db_insert_placeholder_2] => 1588444866.025 [:db_insert_placeholder_3] => [:db_insert_placeholder_4] => 0 [:db_insert_placeholder_5] => b:0; [:db_insert_placeholder_6] => 1 ) in Drupal\Core\Config\CachedStorage->readMultiple() (line 105 of /home/m108/
otved.com/www/core/lib/Drupal/Core/Config/CachedStorage.php).