Fatal error: Uncaught Error: Class 'Contao\CoreBundle\Migration\AbstractMigration' not found in /home/benjamincb/demos/acdg-site/vendor/contao/newsletter-bundle/src/Migration/Version410/DenyListMigration.php:22 Stack trace: #0 {main} thrown in /home/benjamincb/demos/acdg-site/vendor/contao/newsletter-bundle/src/Migration/Version410/DenyListMigration.php on line 22