Fatal error: Uncaught Error: Interface "Psr\Container\ContainerInterface" not found in /home/.sites/site4/wwwroot/web/4.0/ui/vendor/symfony/dependency-injection/ContainerInterface.php:25 Stack trace: #0 {main} thrown in /home/.sites/site4/wwwroot/web/4.0/ui/vendor/symfony/dependency-injection/ContainerInterface.php on line 25