Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in C:\xampp\htdocs\retrodex\helpdesk\vendor\symfony\validator\Test\ConstraintValidatorTestCase.php:42 Stack trace: #0 {main} thrown in C:\xampp\htdocs\retrodex\helpdesk\vendor\symfony\validator\Test\ConstraintValidatorTestCase.php on line 42