Fatal error: Uncaught Error: Interface "Symfony\Component\DependencyInjection\Dumper\DumperInterface" not found in /home/matrixweb/public_html/whmcs2022/whmcs/vendor/symfony/dependency-injection/Dumper/Dumper.php:21 Stack trace: #0 {main} thrown in /home/matrixweb/public_html/whmcs2022/whmcs/vendor/symfony/dependency-injection/Dumper/Dumper.php on line 21