Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestSuite" not found in /var/www/html/ilias/components/ILIAS/Database/tests/Setup/ilDatabaseSetupSuite.php:21 Stack trace: #0 {main} thrown in /var/www/html/ilias/components/ILIAS/Database/tests/Setup/ilDatabaseSetupSuite.php on line 21