Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in /home/ttsadmin/public_html/demo-ecommerceapi.devxportal.com/vendor/symfony/service-contracts/Test/ServiceLocatorTest.php:18 Stack trace: #0 {main} thrown in /home/ttsadmin/public_html/demo-ecommerceapi.devxportal.com/vendor/symfony/service-contracts/Test/ServiceLocatorTest.php on line 18