A How-To-Guide for granting Facebook Access (where page is owned by an individual person not a Business Manager) 

1: From Facebook Home Page's Feed, click your profile picture in the top right.

2. Click Settings and privacy and select Settings.

3. In the left menu, click Page setup.

4. Click Page access.

5: From Page access, you should be able to see the request under Pending access request.

6: Click Review request > Next.

7: Click Accept.

8: Enter the Facebook profile’s password and hit Confirm.