Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in /home/php8crons/public_html/amazon-sp-api/vendor/guzzlehttp/psr7/tests/NoSeekStreamTest.php:15 Stack trace: #0 {main} thrown in /home/php8crons/public_html/amazon-sp-api/vendor/guzzlehttp/psr7/tests/NoSeekStreamTest.php on line 15