Fatal error: Uncaught Error: Class 'Symfony\Component\Lock\Exception\InvalidArgumentException' not found in /home/discovergreece/public_html/vendor/symfony/lock/Exception/InvalidTtlException.php:17 Stack trace: #0 {main} thrown in /home/discovergreece/public_html/vendor/symfony/lock/Exception/InvalidTtlException.php on line 17