Cannot add manager

In my tree, Arline Esther Potash.

I was the manager of this profile which I initially added. Arline Esther joined the tree per my invite. I also invited her to manage her profile as well. Thereafter, I lost my manager rights to her profile. Neither she nor I were able to add me as a manager using the actions menu where no manager options were listed. Please help or advise

David Perkins
David Perkins