Fatal error: Uncaught PDOException: SQLSTATE[HY000]: General error: 2006 MySQL server has gone away in /var/www/html/wordpress/wp-content/plugins/mailpoet/vendor-prefixed/doctrine/dbal/lib/Doctrine/DBAL/Driver/PDOConnection.php:98 Stack trace: #0 /var/www/html/wordpress/wp-content/plugins/mailpoet/vendor-prefixed/doctrine/dbal/lib/Doctrine/DBAL/Driver/PDOConnection.php(98): PDO->query('SELECT t0.name ...') #1 /var/www/html/wordpress/wp-content/plugins/mailpoet/vendor-prefixed/doctrine/dbal/lib/Doctrine/DBAL/Connection.php(736): MailPoetVendor\Doctrine\DBAL\Driver\PDOConnection->query('SELECT t0.name ...') #2 /var/www/html/wordpress/wp-content/plugins/mailpoet/vendor-prefixed/doctrine/orm/lib/Doctrine/ORM/Persisters/Entity/BasicEntityPersister.php(699): MailPoetVendor\Doctrine\DBAL\Connection->executeQuery('SELECT t0.name ...', Array, Array) #3 /var/www/html/wordpress/wp-content/plugins/mailpoet/vendor-prefixed/doctrine/orm/lib/Doctrine/ORM/EntityRepository.php(167): MailPoetVendor\Doctrine\ORM\Persisters\Entity\BasicEntit in /var/www/html/wordpress/wp-content/plugins/mailpoet/vendor-prefixed/doctrine/dbal/lib/Doctrine/DBAL/Driver/AbstractMySQLDriver.php on line 108