With Facebook's new update, this is the new way to accept a Facebook Access request.
Facebook Access Instructions
1. Go to your business Facebook Profile page.
2. Click Manage.
2. Click Page Access.
3. Under "Business accounts with access" you will see a request from TinyBull. Follow the steps to accept the request from TinyBull. If you aren't able to see the request, you will receive instructions for whom to personally give Facebook Access.