Fatal error: Uncaught Error: Class 'Symfony\Component\Validator\Constraints\AbstractComparison' not found in C:\Apache24\htdocs\InvoiceTracking\vendor\symfony\validator\Constraints\EqualTo.php:22 Stack trace: #0 {main} thrown in C:\Apache24\htdocs\InvoiceTracking\vendor\symfony\validator\Constraints\EqualTo.php on line 22