For the past three months I have been unable to play any of my Uplay games in offline mode. They work fine when in online mode, but when I switch to offline mode I get a screen that says "you don't have any games now, but when you do they will appear here". I am not sure what they problem is, I have uninstalled and reinstalled Uplay, all of my games and have reinstalled windows but the problem still exists.
I have contacted support and they recommended that I play a game for at least an hour, then it might start working in offline. I have not had time to try it yet, but maybe it helps you.
Thanks for the update Ftbscreamer!