I appreciate that this is a Joomla error, but, I am not sure if my one is CB related. It has been bugging me for a few months and I have resolved it, but still have an issue.
I have the CB Login module set to 'Guest', as I want menu option 'Login' to disappear to signed in members, only to show 'Logout'. This did work, but recently started showing the error message after login.
When I switch the module to public, the error goes, but I get Login and Logout menu options at the same time.