Fatal error: Uncaught Error: Interface "Symfony\Component\Config\Definition\ConfigurationInterface" not found in /home/irishdeedsindex/public_html/blog/concrete/vendor/symfony/config/Tests/Fixtures/Configuration/ExampleConfiguration.php:17 Stack trace: #0 {main} thrown in /home/irishdeedsindex/public_html/blog/concrete/vendor/symfony/config/Tests/Fixtures/Configuration/ExampleConfiguration.php on line 17