Fatal error: Uncaught Error: Interface "Psr\Container\ContainerInterface" not found in C:\AppServ\Apache\2.4.58\htdocs\sets\vendor\symfony\service-contracts\ServiceProviderInterface.php:24 Stack trace: #0 {main} thrown in C:\AppServ\Apache\2.4.58\htdocs\sets\vendor\symfony\service-contracts\ServiceProviderInterface.php on line 24