I purchased and installed the Sims 4 Castle kit 3 days ago. Ever since I got the kit, I've been facing extreme lagging in my game. It only appeared to happen when I was in building mode, specifically...
@crinrict The crashes stop happening after I created a new save. I played with the new file for a while, then I went back and loaded my previous castle game save, and no crash or glitch appeared in build mode. Hope it keeps going like this... Thanks for your help!