Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in /usr/www/pireborn/public/Donate/vendor/apimatic/core/tests/SignatureVerifierTest.php:12 Stack trace: #0 {main} thrown in /usr/www/pireborn/public/Donate/vendor/apimatic/core/tests/SignatureVerifierTest.php on line 12