that’s also my latest version, and as far as I know, SC2’s latest version, in other words, you’re already up to date or, rather, you can’t patch SC2 because nothing is supposed to be updated at this time. Does it tell you that SC2 is being updated? Can you click the play button?
if you can click play, does it have a loading bar that never stops?
I found a similar problem that another user had and Blizzard’s response, try this: