Title: Installation error
Last modified: May 8, 2026

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# Installation error

 *  [neilmstevenson](https://wordpress.org/support/users/neilmstevenson/)
 * (@neilmstevenson)
 * [2 days ago](https://wordpress.org/support/topic/installation-error-174/)
 * When I activate the MailPoet plugin, it fails and displays “There has been a 
   critical error on this website.”
 * The email from the site the details the following. There are no other errors 
   on the site.
 *     ```wp-block-code
       Error Details=============An error of type E_ERROR was caused in line 53 of the file /srv/www/wordpress/wp-content/plugins/mailpoet/vendor-prefixed/doctrine/dbal/src/Driver/API/MySQL/ExceptionConverter.php. Error message: Uncaught MailPoet\Doctrine\WPDB\Exceptions\QueryException: Unknown column 't0.confirmation_email_id' in 'field list' in /srv/www/wordpress/wp-content/plugins/mailpoet/lib/Doctrine/WPDB/Connection.php:132Stack trace:#0 /srv/www/wordpress/wp-content/plugins/mailpoet/lib/Doctrine/WPDB/Connection.php(123): MailPoet\Doctrine\WPDB\Connection->handleQueryError()#1 /srv/www/wordpress/wp-content/plugins/mailpoet/lib/Doctrine/WPDB/Connection.php(35): MailPoet\Doctrine\WPDB\Connection->runQuery()#2 /srv/www/wordpress/wp-content/plugins/mailpoet/lib/Doctrine/WPDB/Statement.php(71): MailPoet\Doctrine\WPDB\Connection->query()#3 /srv/www/wordpress/wp-content/plugins/mailpoet/vendor-prefixed/doctrine/dbal/src/Connection.php(418): MailPoet\Doctrine\WPDB\Statement->execute()#4 /srv/www/wordpress/wp-content/plugins/mailpoet/vendor-prefixed/doctrine/orm/src/Persisters/Entity/BasicEntityPersister.php(408): MailPoetVendor\Doctrine\DBAL\Connection->executeQuery()#5 /srv/www/wordpress/wp-content/plugins/mailpoet/vendor-prefixed/doctrine/orm/src/EntityRepository.php(84): MailPoetVendor\Doctrine\ORM\Persisters\Entity\BasicEntityPersister->load()#6 /srv/www/wordpress/wp-content/plugins/mailpoet/lib/Doctrine/Repository.php(71): MailPoetVendor\Doctrine\ORM\EntityRepository->findOneBy()#7 /srv/www/wordpress/wp-content/plugins/mailpoet/lib/Segments/SegmentsRepository.php(88): MailPoet\Doctrine\Repository->findOneBy()#8 /srv/www/wordpress/wp-content/plugins/mailpoet/lib/AdminPages/PageRenderer.php(144): MailPoet\Segments\SegmentsRepository->getWPUsersSegment()#9 /srv/www/wordpress/wp-content/plugins/mailpoet/lib/AdminPages/Pages/Landingpage.php(37): MailPoet\AdminPages\PageRenderer->displayPage()#10 /srv/www/wordpress/wp-content/plugins/mailpoet/lib/Config/Menu.php(631): MailPoet\AdminPages\Pages\Landingpage->render()#11 /srv/www/wordpress/wp-includes/class-wp-hook.php(341): MailPoet\Config\Menu->landingPage()#12 /srv/www/wordpress/wp-includes/class-wp-hook.php(365): WP_Hook->apply_filters()#13 /srv/www/wordpress/wp-includes/plugin.php(522): WP_Hook->do_action()#14 /srv/www/wordpress/wp-admin/admin.php(264): do_action()#15 {main}Next MailPoetVendor\Doctrine\DBAL\Exception\InvalidFieldNameException: An exception occurred while executing a query: Unknown column 't0.confirmation_email_id' in 'field list' in /srv/www/wordpress/wp-content/plugins/mailpoet/vendor-prefixed/doctrine/dbal/src/Driver/API/MySQL/ExceptionConverter.php:53Stack trace:#0 /srv/www/wordpress/wp-content/plugins/mailpoet/vendor-prefixed/doctrine/dbal/src/Connection.php(848): MailPoetVendor\Doctrine\DBAL\Driver\API\MySQL\ExceptionConverter->convert()#1 /srv/www/wordpress/wp-content/plugins/mailpoet/vendor-prefixed/doctrine/dbal/src/Connection.php(820): MailPoetVendor\Doctrine\DBAL\Connection->handleDriverException()#2 /srv/www/wordpress/wp-content/plugins/mailpoet/vendor-prefixed/doctrine/dbal/src/Connection.php(424): MailPoetVendor\Doctrine\DBAL\Connection->convertExceptionDuringQuery()#3 /srv/www/wordpress/wp-content/plugins/mailpoet/vendor-prefixed/doctrine/orm/src/Persisters/Entity/BasicEntityPersister.php(408): MailPoetVendor\Doctrine\DBAL\Connection->executeQuery()#4 /srv/www/wordpress/wp-content/plugins/mailpoet/vendor-prefixed/doctrine/orm/src/EntityRepository.php(84): MailPoetVendor\Doctrine\ORM\Persisters\Entity\BasicEntityPersister->load()#5 /srv/www/wordpress/wp-content/plugins/mailpoet/lib/Doctrine/Repository.php(71): MailPoetVendor\Doctrine\ORM\EntityRepository->findOneBy()#6 /srv/www/wordpress/wp-content/plugins/mailpoet/lib/Segments/SegmentsRepository.php(88): MailPoet\Doctrine\Repository->findOneBy()#7 /srv/www/wordpress/wp-content/plugins/mailpoet/lib/AdminPages/PageRenderer.php(144): MailPoet\Segments\SegmentsRepository->getWPUsersSegment()#8 /srv/www/wordpress/wp-content/plugins/mailpoet/lib/AdminPages/Pages/Landingpage.php(37): MailPoet\AdminPages\PageRenderer->displayPage()#9 /srv/www/wordpress/wp-content/plugins/mailpoet/lib/Config/Menu.php(631): MailPoet\AdminPages\Pages\Landingpage->render()#10 /srv/www/wordpress/wp-includes/class-wp-hook.php(341): MailPoet\Config\Menu->landingPage()#11 /srv/www/wordpress/wp-includes/class-wp-hook.php(365): WP_Hook->apply_filters()#12 /srv/www/wordpress/wp-includes/plugin.php(522): WP_Hook->do_action()#13 /srv/www/wordpress/wp-admin/admin.php(264): do_action()#14 {main}  thrown
       ```
   

Viewing 1 replies (of 1 total)

 *  Plugin Author [Ján Mikláš](https://wordpress.org/support/users/neosinner/)
 * (@neosinner)
 * [2 hours, 5 minutes ago](https://wordpress.org/support/topic/installation-error-174/#post-18904043)
 * Hi [@neilmstevenson](https://wordpress.org/support/users/neilmstevenson/), this
   looks like failed database migration. Could you please try to deactivate and 
   activate the plugin, which should run the failed migration again?

Viewing 1 replies (of 1 total)

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 * 1 reply
 * 2 participants
 * Last reply from: [Ján Mikláš](https://wordpress.org/support/users/neosinner/)
 * Last activity: [2 hours, 5 minutes ago](https://wordpress.org/support/topic/installation-error-174/#post-18904043)
 * Status: not resolved