Game save issues with new world

When ever I finish in creating a new world, I pick a place for my sims to live, the game loads properly, and then it takes me back to select a world. Then I try to see if my sim's household is in the world and it's not. The game let me saves but my sim is no where to be found. It's not in the world households but the sim still shows up when I try to load the game. All my previously saved worlds are fine, but I can't create sims or add new worlds. I can click to go into the new game once it's made, but it gives me an error code and says to restart the game. Nothing makes it load. It hasn't been fixed with any new updates either. This started after I got some new packs, but I've uninstalled them and repaired the game multiple times and I still get the same error. I'm leaving the all packs uninstalled. Anyone know how to fix it?