Fatal error: Uncaught Error: Class "PHPUnit_Framework_TestCase" not found in /home/airtimer/public_html/vendor/amzn/amazon-pay-sdk-php/Psr/Log/Test/LoggerInterfaceTest.php:14 Stack trace: #0 {main} thrown in /home/airtimer/public_html/vendor/amzn/amazon-pay-sdk-php/Psr/Log/Test/LoggerInterfaceTest.php on line 14