Can't add members Code 1005

Can’t seem to add members. When we Invite members we get the error Couldn’t invite [email protected] and then at the base of the page Error processing member: user is in an incompatible authorization system (Code:1005). We managed to invite another user but when we click on the link in the Invite email it immediately comes back saying that its been revoked. We then revoke that request and send another and the same thing happens. We don’t appear to be able to invite users.Thanks in advance for your assistance.

A post was merged into an existing topic: I cant add new member / Error 1005