Op Generation Failed

Hey! I just started a new save today. I put down a lot that I built on my old laptop, with no mods or CC and had moved my OG sim from their empty lot to that one. It was initially a cafe lot that I swapped to residential because I made it before the business and hobbies expansion. So I place my Sim in the lot and go to add some stairs to the third level to build him a unit and then I get an error that says "Op Generation Failed" tried it with some ladders, still failed but didn't give me a notification. 

I thought it might just be the lot, so I went to an empty lot in build mode: still got the error. Then tried to test out walls, to see if those would work. Sure do, but I went to click undo to erase the walls and undo button no longer works. Sledge Hammer does work on the first try but then stops working. 

Put down a bench, that works. Tried to move it? Won't place, no error message. 

Any ideas?