Fatal error: Uncaught Error: Class 'Doctrine\DBAL\Schema\Synchronizer\AbstractSchemaSynchronizer' not found in /srv/www/c5www/html/updates/concrete5-8.5.1/concrete/vendor/doctrine/dbal/lib/Doctrine/DBAL/Sharding/SQLAzure/SQLAzureFederationsSynchronizer.php:40 Stack trace: #0 {main} thrown in /srv/www/c5www/html/updates/concrete5-8.5.1/concrete/vendor/doctrine/dbal/lib/Doctrine/DBAL/Sharding/SQLAzure/SQLAzureFederationsSynchronizer.php on line 40