To get approved to "manage_pages" permission please complete notes in Facebook developer console.
Details to be filled in textarea:
- Go to https://app.rubo.io
- Login with credentials, email: {your emails}, password: {your password}
- Click username in top navigation bar
- Select “Connected FB accounts”
- Click on “Connect new Facebook account”
- Select “{your application}” application.
After filling all details click Save button.