Fatal error: Uncaught Error: Class "Herrera\PHPUnit\TestCase" not found in /home/devmindz/public_html/fedex_api/php/vendor/herrera-io/json/src/tests/Herrera/Json/Tests/JsonTest.php:11 Stack trace: #0 {main} thrown in /home/devmindz/public_html/fedex_api/php/vendor/herrera-io/json/src/tests/Herrera/Json/Tests/JsonTest.php on line 11