500 Errors on CB User Menu items

I cannot access the user profile when the user level is anything above Registered - clicking the menu item to view profile (Users » User Profile in menu) returns a 500 error. If I use an account set to "Registered" user group, this menu works, as do the edit and other menus.

I vaguely recall CB Auto Actions, but I think I only used it on a website that had CBSubs - this site does not have that.

Is Auto Actions a plug-in, or is it something used in the fields - I don't recall?

Thank you,
Ernie

Enable debug mode and maximum error reporting in Joomla global configuration then retry to see if any errors output. It has to be something only accessible to CB moderators then if regular users are unaffected. If no errors outputting try unpublishing non-core plugins 1 by 1 within CB > Plugin Management until issue goes away.