Try 1 to fix the problem after Slim Framework 4 upgrade when running grocy in a subdirectory

app.php

@@ -4,6 +4,7 @@ use Psr\Http\Message\ServerRequestInterface as Request;
 use Psr\Http\Message\ResponseInterface as Response;
 use Psr\Container\ContainerInterface as Container;
 use Slim\Factory\AppFactory;
+use Selective\BasePath\BasePathMiddleware;
 
 use Grocy\Helpers\UrlManager;
 use Grocy\Controllers\LoginController;
@@ -70,6 +71,7 @@ require_once __DIR__ . '/routes.php';
 
 // Add default middleware
 $app->addRoutingMiddleware();
+$app->add(new BasePathMiddleware($app));
 $app->addErrorMiddleware(true, false, false);
 
 $app->run();