Lumen installation error

I am trying to install lumen with composer so I used the command below

composer create-project --prefer-dist laravel/lumen api But, for some reason I am getting this error before even doing anything, just visiting the public folder.

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1/1 NotFoundHttpException in RoutesRequests.php line 442: in RoutesRequests.php line 442 at Application->handleDispatcherResponse(array('0')) in RoutesRequests.php line 381 at Application->Laravel\Lumen\Concerns{closure}() in RoutesRequests.php line 624 at Application->sendThroughPipeline(array(), object(Closure)) in RoutesRequests.php line 382 at Application->dispatch(null) in RoutesRequests.php line 327 at Application->run() in index.php line 28