Since new patch game cannot be saved

Starcraft Remastered. Last night new patch was installed. Immediately after the game cannot be saved. When you try to save it, a message is displayed.
Is there anyway to discard the last patch and re-establish the previous one?
Also I tried to re-install StarCraft Remastered but it requests to download an Activation Key and when I tried to do it it took me to a non ending survey requesting all kind of information. How can I get the Activation Key?