Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in C:\xampp\htdocs\vendor\robthree\twofactorauth\tests\Providers\Rng\CSRNGProviderTest.php:10 Stack trace: #0 {main} thrown in C:\xampp\htdocs\vendor\robthree\twofactorauth\tests\Providers\Rng\CSRNGProviderTest.php on line 10