Fatal error: Uncaught Error: Class "Yoast\PHPUnitPolyfills\TestCases\TestCase" not found in D:\Server\ProjectJI\vendor\aws\aws-sdk-php\tests\MultiRegionClientTest.php:18 Stack trace: #0 {main} thrown in D:\Server\ProjectJI\vendor\aws\aws-sdk-php\tests\MultiRegionClientTest.php on line 18