Omeka S encountered an error

Doctrine\DBAL\Exception\DriverException
An exception occurred while executing 'SELECT * FROM setting': SQLSTATE[HY000]: General error: 2006 MySQL server has gone away

Details:

PDOException: SQLSTATE[HY000]: General error: 2006 MySQL server has gone away in /home/ocomedu/acutrials.ocom.edu/vendor/doctrine/dbal/lib/Doctrine/DBAL/Driver/PDOConnection.php:88
Stack trace:
#0 /home/ocomedu/acutrials.ocom.edu/vendor/doctrine/dbal/lib/Doctrine/DBAL/Driver/PDOConnection.php(88): PDO->query('SELECT * FROM s...')
#1 /home/ocomedu/acutrials.ocom.edu/vendor/doctrine/dbal/lib/Doctrine/DBAL/Connection.php(910): Doctrine\DBAL\Driver\PDOConnection->query('SELECT * FROM s...')
#2 /home/ocomedu/acutrials.ocom.edu/vendor/doctrine/dbal/lib/Doctrine/DBAL/Connection.php(845): Doctrine\DBAL\Connection->executeQuery('SELECT * FROM s...', Array, Array)
#3 /home/ocomedu/acutrials.ocom.edu/application/src/Settings/AbstractSettings.php(155): Doctrine\DBAL\Connection->fetchAll('SELECT * FROM s...')
#4 /home/ocomedu/acutrials.ocom.edu/application/src/Settings/AbstractSettings.php(149): Omeka\Settings\AbstractSettings->setCache()
#5 /home/ocomedu/acutrials.ocom.edu/application/src/Settings/AbstractSettings.php(95): Omeka\Settings\AbstractSettings->cache()
#6 /home/ocomedu/acutrials.ocom.edu/application/src/Mvc/MvcListeners.php(93): Omeka\Settings\AbstractSettings->get('version')
#7 /home/ocomedu/acutrials.ocom.edu/vendor/zendframework/zend-eventmanager/src/EventManager.php(322): Omeka\Mvc\MvcListeners->bootstrapSession(Object(Zend\Mvc\MvcEvent))
#8 /home/ocomedu/acutrials.ocom.edu/vendor/zendframework/zend-eventmanager/src/EventManager.php(171): Zend\EventManager\EventManager->triggerListeners(Object(Zend\Mvc\MvcEvent))
#9 /home/ocomedu/acutrials.ocom.edu/vendor/zendframework/zend-mvc/src/Application.php(161): Zend\EventManager\EventManager->triggerEvent(Object(Zend\Mvc\MvcEvent))
#10 /home/ocomedu/acutrials.ocom.edu/application/src/Mvc/Application.php(40): Zend\Mvc\Application->bootstrap(Array)
#11 /home/ocomedu/acutrials.ocom.edu/index.php(19): Omeka\Mvc\Application::init(Array)
#12 {main}

Next Doctrine\DBAL\Driver\PDOException: SQLSTATE[HY000]: General error: 2006 MySQL server has gone away in /home/ocomedu/acutrials.ocom.edu/vendor/doctrine/dbal/lib/Doctrine/DBAL/Driver/PDOConnection.php:90
Stack trace:
#0 /home/ocomedu/acutrials.ocom.edu/vendor/doctrine/dbal/lib/Doctrine/DBAL/Connection.php(910): Doctrine\DBAL\Driver\PDOConnection->query('SELECT * FROM s...')
#1 /home/ocomedu/acutrials.ocom.edu/vendor/doctrine/dbal/lib/Doctrine/DBAL/Connection.php(845): Doctrine\DBAL\Connection->executeQuery('SELECT * FROM s...', Array, Array)
#2 /home/ocomedu/acutrials.ocom.edu/application/src/Settings/AbstractSettings.php(155): Doctrine\DBAL\Connection->fetchAll('SELECT * FROM s...')
#3 /home/ocomedu/acutrials.ocom.edu/application/src/Settings/AbstractSettings.php(149): Omeka\Settings\AbstractSettings->setCache()
#4 /home/ocomedu/acutrials.ocom.edu/application/src/Settings/AbstractSettings.php(95): Omeka\Settings\AbstractSettings->cache()
#5 /home/ocomedu/acutrials.ocom.edu/application/src/Mvc/MvcListeners.php(93): Omeka\Settings\AbstractSettings->get('version')
#6 /home/ocomedu/acutrials.ocom.edu/vendor/zendframework/zend-eventmanager/src/EventManager.php(322): Omeka\Mvc\MvcListeners->bootstrapSession(Object(Zend\Mvc\MvcEvent))
#7 /home/ocomedu/acutrials.ocom.edu/vendor/zendframework/zend-eventmanager/src/EventManager.php(171): Zend\EventManager\EventManager->triggerListeners(Object(Zend\Mvc\MvcEvent))
#8 /home/ocomedu/acutrials.ocom.edu/vendor/zendframework/zend-mvc/src/Application.php(161): Zend\EventManager\EventManager->triggerEvent(Object(Zend\Mvc\MvcEvent))
#9 /home/ocomedu/acutrials.ocom.edu/application/src/Mvc/Application.php(40): Zend\Mvc\Application->bootstrap(Array)
#10 /home/ocomedu/acutrials.ocom.edu/index.php(19): Omeka\Mvc\Application::init(Array)
#11 {main}

Next Doctrine\DBAL\Exception\DriverException: An exception occurred while executing 'SELECT * FROM setting':

SQLSTATE[HY000]: General error: 2006 MySQL server has gone away in /home/ocomedu/acutrials.ocom.edu/vendor/doctrine/dbal/lib/Doctrine/DBAL/Driver/AbstractMySQLDriver.php:106
Stack trace:
#0 /home/ocomedu/acutrials.ocom.edu/vendor/doctrine/dbal/lib/Doctrine/DBAL/DBALException.php(169): Doctrine\DBAL\Driver\AbstractMySQLDriver->convertException('An exception oc...', Object(Doctrine\DBAL\Driver\PDOException))
#1 /home/ocomedu/acutrials.ocom.edu/vendor/doctrine/dbal/lib/Doctrine/DBAL/DBALException.php(145): Doctrine\DBAL\DBALException::wrapException(Object(Doctrine\DBAL\Driver\PDOMySql\Driver), Object(Doctrine\DBAL\Driver\PDOException), 'An exception oc...')
#2 /home/ocomedu/acutrials.ocom.edu/vendor/doctrine/dbal/lib/Doctrine/DBAL/Connection.php(913): Doctrine\DBAL\DBALException::driverExceptionDuringQuery(Object(Doctrine\DBAL\Driver\PDOMySql\Driver), Object(Doctrine\DBAL\Driver\PDOException), 'SELECT * FROM s...', Array)
#3 /home/ocomedu/acutrials.ocom.edu/vendor/doctrine/dbal/lib/Doctrine/DBAL/Connection.php(845): Doctrine\DBAL\Connection->executeQuery('SELECT * FROM s...', Array, Array)
#4 /home/ocomedu/acutrials.ocom.edu/application/src/Settings/AbstractSettings.php(155): Doctrine\DBAL\Connection->fetchAll('SELECT * FROM s...')
#5 /home/ocomedu/acutrials.ocom.edu/application/src/Settings/AbstractSettings.php(149): Omeka\Settings\AbstractSettings->setCache()
#6 /home/ocomedu/acutrials.ocom.edu/application/src/Settings/AbstractSettings.php(95): Omeka\Settings\AbstractSettings->cache()
#7 /home/ocomedu/acutrials.ocom.edu/application/src/Mvc/MvcListeners.php(93): Omeka\Settings\AbstractSettings->get('version')
#8 /home/ocomedu/acutrials.ocom.edu/vendor/zendframework/zend-eventmanager/src/EventManager.php(322): Omeka\Mvc\MvcListeners->bootstrapSession(Object(Zend\Mvc\MvcEvent))
#9 /home/ocomedu/acutrials.ocom.edu/vendor/zendframework/zend-eventmanager/src/EventManager.php(171): Zend\EventManager\EventManager->triggerListeners(Object(Zend\Mvc\MvcEvent))
#10 /home/ocomedu/acutrials.ocom.edu/vendor/zendframework/zend-mvc/src/Application.php(161): Zend\EventManager\EventManager->triggerEvent(Object(Zend\Mvc\MvcEvent))
#11 /home/ocomedu/acutrials.ocom.edu/application/src/Mvc/Application.php(40): Zend\Mvc\Application->bootstrap(Array)
#12 /home/ocomedu/acutrials.ocom.edu/index.php(19): Omeka\Mvc\Application::init(Array)
#13 {main}