Fatal error: Uncaught Error: Interface "Psr\Container\ContainerInterface" not found in /home/.sites/site4/wwwroot/web/4.0/ui/vendor/symfony/dependency-injection/ParameterBag/ContainerBagInterface.php:22 Stack trace: #0 {main} thrown in /home/.sites/site4/wwwroot/web/4.0/ui/vendor/symfony/dependency-injection/ParameterBag/ContainerBagInterface.php on line 22