Edit your index.php file
$app->run();
to
$app->run($app['request']);
I installed Lumen via composer create-project laravel/lumen --prefer-dist with the OpenSSL PHP Extension, Mbstring PHP Extension and Tokenizer PHP Extension installed but always receive a 404 Sorry, the page you are looking for could not be found response. I added routes to the default one but no route does work. I tested this with Windows 8 (with XAMPP) and Ubuntu.
Edit your index.php file
$app->run();
to
$app->run($app['request']);
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