Fatal error: Uncaught Error: Class 'PHPUnit\Framework\TestCase' not found in C:\xampp\htdocs\laravel-back\vendor\symfony\translation\Test\ProviderTestCase.php:30 Stack trace: #0 {main} thrown in C:\xampp\htdocs\laravel-back\vendor\symfony\translation\Test\ProviderTestCase.php on line 30