Fatal error: Uncaught Error: Interface "Symfony\Component\Lock\Exception\ExceptionInterface" not found in /var/www/html/demo.ininli.ca/releases/18/vendor/symfony/lock/Exception/UnserializableKeyException.php:21 Stack trace: #0 {main} thrown in /var/www/html/demo.ininli.ca/releases/18/vendor/symfony/lock/Exception/UnserializableKeyException.php on line 21