Fatal error: Uncaught Error: Class "Symfony\Component\Validator\Constraint" not found in C:\Apache24\htdocs\cms_upgrade\vendor\commerceguys\addressing\src\Validator\Constraints\AddressFormatConstraint.php:15 Stack trace: #0 {main} thrown in C:\Apache24\htdocs\cms_upgrade\vendor\commerceguys\addressing\src\Validator\Constraints\AddressFormatConstraint.php on line 15