The following active BuddyPress Components do not have associated WordPress Pages: Activate, Regist

Hi,
we have installed Buddypress (before we’ve set the permalinks to /sample-post/) however the feared message “The following active BuddyPress Components do not have associated WordPress Pages: Activate, Register. Repair” is persistant. We uninstalled and re-installed buddypress, with no luck.

What else can we do there?
Thanks!