Wordpress problem with Mailpoet plug-in

Wordpress has emailed me to say that there is a problem with the amailpoet plugin, even though everything has been working fine. I’m not very technical and the details they have sent me make no sense with my limited knowledge. I post the message here and if anyone has any ideas, I’d be so grateful. My hosting company says it’s a Wordpress problem.

Error Details

An error of type E_ERROR was caused in line 2 of the file /home/gr1p0y3dqxmn/public_html/wp-content/plugins/mailpoet/vendor-prefixed/doctrine/dbal/lib/Doctrine/DBAL/Driver/AbstractMySQLDriver.php. Error message: Uncaught PDOException: SQLSTATE[HY000]: General error: 2006 MySQL server has gone away in /home/gr1p0y3dqxmn/public_html/wp-content/plugins/mailpoet/vendor-prefixed/doctrine/dbal/lib/Doctrine/DBAL/Driver/PDOConnection.php:2
Stack trace:
#0 /home/gr1p0y3dqxmn/public_html/wp-content/plugins/mailpoet/vendor-prefixed/doctrine/dbal/lib/Doctrine/DBAL/Driver/PDOConnection.php(2): PDO->query(‘SELECT t0.name …’)
#1 /home/gr1p0y3dqxmn/public_html/wp-content/plugins/mailpoet/vendor-prefixed/doctrine/dbal/lib/Doctrine/DBAL/Connection.php(2): MailPoetVendor\Doctrine\DBAL\Driver\PDOConnection->query(‘SELECT t0.name …’)
#2 /home/gr1p0y3dqxmn/public_html/wp-content/plugins/mailpoet/vendor-prefixed/doctrine/orm/lib/Doctrine/ORM/Persisters/Entity/BasicEntityPersister.php(2): MailPoetVendor\Doctrine\DBAL\Connection->executeQuery(‘SELECT t0.name …’, Array, Array)
#3 /home/gr1p0y3dqxmn/public_html/wp-content/plugins/mailpoet/vendor-prefixed/doctrine/orm/lib/Doctrine/ORM/EntityRepository.php(2): MailPoetVendor\Doctrine\ORM\P