Fatal error: Uncaught Error: Interface "Doctrine\ORM\Cache\Persister\Collection\CachedCollectionPersister" not found in /srv/disk1/2895578/www/whittonphotographicclub.org.uk/concrete/vendor/doctrine/orm/lib/Doctrine/ORM/Cache/Persister/Collection/AbstractCollectionPersister.php:28 Stack trace: #0 {main} thrown in /srv/disk1/2895578/www/whittonphotographicclub.org.uk/concrete/vendor/doctrine/orm/lib/Doctrine/ORM/Cache/Persister/Collection/AbstractCollectionPersister.php on line 28