Your client has a Facebook Group that they want you to manage, but you're not an admin. Don't worry, it's an easy fix!
These instructions were derived from Facebook's Help Center.
First, make sure you are a member of the group you wish to be an admin of. Then please ask your client to follow these 3 simple steps:
Navigate to the group: From your News Feed, click Groups in the left menu and select your group.
Click Members in the group menu.
Click next to the person you want to make an admin or moderator. Then select Make Admin.
That's it! You should have now received an invite on Facebook to become an Admin. Click the notification and accept the invite.
