Fatal error: Uncaught Error: Class "PHPUnit_Framework_TestCase" not found in C:\xampp\htdocs\uploadPdf\vendor\aws\aws-crt-php\tests\common.inc:10 Stack trace: #0 C:\xampp\htdocs\uploadPdf\vendor\aws\aws-crt-php\tests\StreamTest.php(8): require_once() #1 {main} thrown in C:\xampp\htdocs\uploadPdf\vendor\aws\aws-crt-php\tests\common.inc on line 10