Fatal error: Uncaught Error: Class 'PHPUnit\Framework\Constraint\Constraint' not found in /home/devmecseminars/public_html/mec/vendor/symfony/http-foundation/Test/Constraint/ResponseHasHeader.php:17
Stack trace:
#0 {main}
thrown in /home/devmecseminars/public_html/mec/vendor/symfony/http-foundation/Test/Constraint/ResponseHasHeader.php on line 17