Fatal error: Uncaught Error: Class 'PHPUnit\Framework\Constraint\Constraint' not found in C:\xampp\htdocs\admin\vendor\symfony\http-foundation\Test\Constraint\ResponseHasHeader.php:17
Stack trace:
#0 {main}
thrown in C:\xampp\htdocs\admin\vendor\symfony\http-foundation\Test\Constraint\ResponseHasHeader.php on line 17