Laravel 5.4 not found error for existing route

I am receiving a not found error for an existing laravel route

web.php:

Route::group(['middleware' => 'admin'], function () {
Route::get('/admin', 'AdminPageController@home')->name('admin-home');});

And when I try to access '/admin' in the url it says that it is not found, but all other routes were working fine.

via Chebli Mohamed