Question: I have an API system I am working on and am in need of a quick admin section for simple CRUD actions. So I decided to install ActiveAdmin, but when I go to <http://localhost:3000/admin/login>, I am getting a 406 unacceptable log error and a white screen.

I followed the instructions provided by activeadmin, but it's not working. Anyone else run into this issue?

Here are my routes:

```
TestApp::Application.routes.draw do
  ActiveAdmin.routes(self)

  devise_for :admin_users, ActiveAdmin::Devise.config

  namespace "api" do
    namespace "v1" do

      resources :countries do
        resources :states
      end

      resources :states do
        resources :counties
      end

      resources :counties do
        resources :districts
      end

      resources :districts do
        resources :schools
      end

    end # end v1 Namespace
  end # end api Namespace
end # end TestApp::Application routes

```

Answer: 
The fix for this was to comment out the metasearch gem and then force ActiveAdmin to use formtastic ~> 2.1.1

```
gem 'formtastic', '~> 2.1.1'
gem 'activeadmin'
#gem 'meta_search',    '>= 1.1.0.pre'

```

Bundle Command:

```
bundle update formtastic

```
this solve my problem

```
gem 'activeadmin' , '0.4.2'
gem "formtastic", "~> 2.1.1"

```