BuddyPress.org

@Signaltrap-

Tried to update via SiteAdmin Upgdare> Automatically Upgrade.

Where you running a branch of WPMU 2.7.1 before upgrading?

As I said above, if you were, then you cannot use the auto upgrade feature since WPMU 2.7.1 is the same as WPMU 2.7.1 The upgrade function cannot distinguish between -beta1 and the recently released public version of 2.7.1

So, you must “upgrade” the old fashioned way.