To get approved to "manage_pages" permission please complete notes in Facebook developer console.

Details to be filled in textarea:

  1. Go to https://app.rubo.io
  2. Login with credentials, email: {your emails}, password: {your password}
  3. Click username in top navigation bar
  4. Select “Connected FB accounts”
  5. Click on “Connect new Facebook account”
  6. Select “{your application}” application.

After filling all details click Save button.