Missing "Recent activity"

I’ve BuddyPress Social Child 1.1.2 installed

Now I’ve upgraded MU 2.9.2 and Buddypress 1.2.3

The problem is that in the Home Left Widget now there is this message “Please log in and add widgets to this column. Add Widgets”

And the “Recent activity” widget that I used before and normally display something like this:

Attività sul Sito [RSS]

Stai vedendo 1 oggetti di 1 (su 1 oggetti)

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What can I do to have recent activity on BP Social Home page ?