The Sims Medieval sudden graphics glitch

I've been playing the game for months and everything was fine. However suddenly something happened to the graphics and I can't figure out how to fix it. Origin repair did nothing. Reinstalling the game also didn't help. 

I've updated everything I could find on my computer and everything seems to be in order but the game still looks weird.

Everything is brown/black and unless I mess around with the game settings, the only thing I can see are the bubbles. Changing the settings makes the outlines of buildings visible but everything is still this weird brownish colour.

What happened? How do I fix this?