Fatal error: Uncaught Error: Class "Symfony\Component\DependencyInjection\Definition" not found in /home/trpdev/public_html/vendor/symfony/dependency-injection/Tests/Fixtures/CustomDefinition.php:16 Stack trace: #0 {main} thrown in /home/trpdev/public_html/vendor/symfony/dependency-injection/Tests/Fixtures/CustomDefinition.php on line 16