I talked about that menu
Yes I know, these menu items not work properly because missing public menu of type Easy Profile->Social Network
If anybody login without social buttons these links are working well but a jerror_alertnoauthor is shown.
I think jerror_alertnoauthor comes from K2, try to go Components->K2->Users, you will see an error on your account (see screenshot)
If anybody login with social butons easy profil photos, videos, blogs, events, topics, groups links do not work.
This is normal, all parts of Social Network (photos, videos, blogs, events, topics, groups) not work properly if you not have menu item of type Easy Profile->Social Network (Public)