Fatal error: Uncaught Error: Class "PHPUnit_Framework_TestCase" not found in C:\xampp\htdocs\uploadPdf\vendor\aws\aws-crt-php\tests\ErrorTest.php:8 Stack trace: #0 {main} thrown in C:\xampp\htdocs\uploadPdf\vendor\aws\aws-crt-php\tests\ErrorTest.php on line 8