Fatal error: Uncaught Error: Interface "Symfony\Component\Validator\Context\ExecutionContextInterface" not found in C:\Apache24\htdocs\cms_upgrade\vendor\symfony\validator\Context\ExecutionContext.php:39 Stack trace: #0 {main} thrown in C:\Apache24\htdocs\cms_upgrade\vendor\symfony\validator\Context\ExecutionContext.php on line 39