Fatal error: Uncaught Error: Class 'PayPal\Test\Common\SimpleClass' not found in /home/ultraunlock/public_html/PayPal-PHP-SDK/tests/PayPal/Test/Common/ChildClass.php:4 Stack trace: #0 {main} thrown in /home/ultraunlock/public_html/PayPal-PHP-SDK/tests/PayPal/Test/Common/ChildClass.php on line 4