Fatal error: Uncaught Error: Class 'PHPUnit\Framework\TestCase' not found in /opt/lampp/htdocs/kuesioner/vendor/phar-io/manifest/tests/ManifestSerializerTest.php:47 Stack trace: #0 {main} thrown in /opt/lampp/htdocs/kuesioner/vendor/phar-io/manifest/tests/ManifestSerializerTest.php on line 47