Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in C:\xampp\htdocs\snipe-it\vendor\tecnickcom\tc-lib-barcode\test\TestUtil.php:31 Stack trace: #0 {main} thrown in C:\xampp\htdocs\snipe-it\vendor\tecnickcom\tc-lib-barcode\test\TestUtil.php on line 31