Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in /home/apikharedi/public_html/api/vendor/srmklive/paypal/tests/Unit/ClientTest.php:11 Stack trace: #0 {main} thrown in /home/apikharedi/public_html/api/vendor/srmklive/paypal/tests/Unit/ClientTest.php on line 11