Fatal error: Uncaught Error: Class 'Symfony\Component\Form\ChoiceList\Loader\AbstractChoiceLoader' not found in C:\Apache24\htdocs\InvoiceTracking\vendor\symfony\form\ChoiceList\Loader\CallbackChoiceLoader.php:19 Stack trace: #0 {main} thrown in C:\Apache24\htdocs\InvoiceTracking\vendor\symfony\form\ChoiceList\Loader\CallbackChoiceLoader.php on line 19