Fatal error: Uncaught Error: Class 'PHPUnit\Framework\TestCase' not found in E:\xampp\htdocs\www\qr250\vendor\bacon\bacon-qr-code\test\Encoder\MatrixUtilTest.php:15 Stack trace: #0 {main} thrown in E:\xampp\htdocs\www\qr250\vendor\bacon\bacon-qr-code\test\Encoder\MatrixUtilTest.php on line 15