Fatal error: Uncaught Error: Class "PHPUnit\Framework\Constraint\Constraint" not found in C:\xampp\htdocs\londoncityroom\vendor\symfony\http-foundation\Test\Constraint\ResponseCookieValueSame.php:18 Stack trace: #0 {main} thrown in C:\xampp\htdocs\londoncityroom\vendor\symfony\http-foundation\Test\Constraint\ResponseCookieValueSame.php on line 18