Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in /home/v2appclykk/public_html/sp_payments/vendor/laravel/lumen-framework/src/Testing/TestCase.php:12 Stack trace: #0 {main} thrown in /home/v2appclykk/public_html/sp_payments/vendor/laravel/lumen-framework/src/Testing/TestCase.php on line 12