Fatal error: Uncaught Error: Class "Doctrine\Persistence\Mapping\Driver\FileDriver" not found in /users/energydata/www/volkszaehler.org/vendor/doctrine/orm/lib/Doctrine/ORM/Mapping/Driver/XmlDriver.php:35 Stack trace: #0 {main} thrown in /users/energydata/www/volkszaehler.org/vendor/doctrine/orm/lib/Doctrine/ORM/Mapping/Driver/XmlDriver.php on line 35