Fatal error: Uncaught Error: Class "PHPUnit\Framework\Constraint\Constraint" not found in /home/matrixweb/public_html/whmcs2022/whmcs/vendor/symfony/http-foundation/Test/Constraint/ResponseHasHeader.php:17
Stack trace:
#0 {main}
thrown in /home/matrixweb/public_html/whmcs2022/whmcs/vendor/symfony/http-foundation/Test/Constraint/ResponseHasHeader.php on line 17