Fatal error: Uncaught Error: Interface "Symfony\Component\DependencyInjection\Extension\ExtensionInterface" not found in /home/.sites/site4/wwwroot/web/4.0/ui/vendor/symfony/dependency-injection/Extension/Extension.php:26 Stack trace: #0 {main} thrown in /home/.sites/site4/wwwroot/web/4.0/ui/vendor/symfony/dependency-injection/Extension/Extension.php on line 26