you do not have permission

As the administrator, when I am in a meeting, I can add content to that meeting, but i want to be able add content to the Shared Content folder. When I try I get the error that "You do not have permission to perform this operation. Please contact the Account Administrator for assistance.

I read that I need to be in the Author group to upload content? so in Administration: Users and Groups: I select my username, then hit the Information button, and then Edit Group Membership. the app shows I am a member of Administrator group. In the left hand column, I select Authors and hit the add button. I get error Operation Faile: Account Limit Reached?

How do i get to upload content that can be shared across meetings?

Keithmtx