Getting error 404 with IIS

I´m using IIS and I’m getting this error back (Debug is On): (v2023)404
Not Found
Not found.Debug
#0 C:.…\vendor\slim\slim\Slim\Middleware\RoutingMiddleware.php(44): Slim\Middleware\RoutingMiddleware->performRouting()
#1 C:.…\vendor\slim\slim\Slim\MiddlewareDispatcher.php(121): Slim\Middleware\RoutingMiddleware->process()
#2 C:.…\vendor\selective\samesite-cookie\src\SameSiteCookieMiddleware.php(52): Psr\Http\Server\RequestHandlerInterface@anonymous->handle()
#3 C:.…\vendor\slim\slim\Slim\MiddlewareDispatcher.php(121): Selective\SameSiteCookie\SameSiteCookieMiddleware->process()
#4 C:.…\vendor\selective\samesite-cookie\src\SameSiteSessionMiddleware.php(44): Psr\Http\Server\RequestHandlerInterface@anonymous->handle()
#5 C:.…\vendor\slim\slim\Slim\MiddlewareDispatcher.php(121): Selective\SameSiteCookie\SameSiteSessionMiddleware->process()
#6 C:.…\vendor\slim\slim\Slim\Middleware\ErrorMiddleware.php(76): Psr\Http\Server\RequestHandlerInterface@anonymous->handle()
#7 C:.…\vendor\slim\slim\Slim\MiddlewareDispatcher.php(121): Slim\Middleware\ErrorMiddleware->process()
#8 C:.…\vendor\slim\slim\Slim\MiddlewareDispatcher.php(65): Psr\Http\Server\RequestHandlerInterface@anonymous->handle()
#9 C:.…\vendor\slim\slim\Slim\App.php(199): Slim\MiddlewareDispatcher->handle()
#10 C:.…\vendor\slim\slim\Slim\App.php(183): Slim\App->handle()
#11 C:.…\index.php(134): Slim\App->run()
#12 {main}Any idea?

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