No, permalinks have not fixed the problem.
However, I now have this message:
“The following active BuddyPress Components do not have associated WordPress Pages: User Groups, Members.”
So I click ‘repair’ and it gives me the options:
Associate a WordPress Page with each BuddyPress component directory.”
With the options “Activity Streams, User Groups and Members” (I can select the pages.) At the moment, no pages are selected… is this my problem?