Issue:
Error Message: ..\AddOns\Carbonite.Social\NxSocial.lua line 1339:
attempt to call global 'GetNumFriends' (a nil value)

Solution:
change old function call local cnt = GetNumFriends() to new one local cnt = C_FriendList.GetNumFriends()
(lines 1339 and 1445)

Fixed.