Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in C:\xampp\htdocs\adminlte3\vendor\bacon\bacon-qr-code\test\Common\BitUtilsTest.php:9 Stack trace: #0 {main} thrown in C:\xampp\htdocs\adminlte3\vendor\bacon\bacon-qr-code\test\Common\BitUtilsTest.php on line 9