Having trouble reading this email? Click here. Causing error

Got this error in log file mautic.WARNING: PHP Warning - PDOStatement::execute(): MySQL server has gone away - in file /var/www/html/mautic/vendor/doctrine/dbal/lib/Doctrin$octrine/DBAL/Driver/PDOStatement.php - at line 91

Got this error in log file mautic.WARNING: PHP Warning - PDOStatement::execute(): MySQL server has gone away - in file /var/www/html/mautic/vendor/doctrine/dbal/lib/Doctrin$octrine/DBAL/Driver/PDOStatement.php - at line 91