Fatal error: Uncaught Error: Class 'PHPUnit\Framework\TestCase' not found in /opt/lampp/htdocs/kuesioner/vendor/lcobucci/jwt/test/functional/RFC6978VectorTest.php:15 Stack trace: #0 {main} thrown in /opt/lampp/htdocs/kuesioner/vendor/lcobucci/jwt/test/functional/RFC6978VectorTest.php on line 15