Opening EAC\Recipients\Goups- error: Your request couldn't be completed. Please try again in a few minutes.

1)  This error only occurs when accessing the tab or doing a refresh on the data.
2)  Entering Search criteria does show groups.
3)  In management shell, get-distributiongroup returns all groups successfully.
4)  get-rolegroupmember "organization management"  lists the account I am logging in with.
5)  Permisisons on ECP IIS site are anonymous and basic.
6)  formsauthentication is set to True
7)  ManagedBy is the account I am logged in with.

All other menus and tabs work fine.

Ideas?

Thanks.