Fatal error: Uncaught Error: Interface "Psr\Http\Server\MiddlewareInterface" not found in C:\mywamp\sites\allsite\microfinance2\vendor\slim\slim\Slim\Middleware\OutputBufferingMiddleware.php:26 Stack trace: #0 {main} thrown in C:\mywamp\sites\allsite\microfinance2\vendor\slim\slim\Slim\Middleware\OutputBufferingMiddleware.php on line 26