Items Won't Place in Build/Buy Mode

I just downloaded the new kits, along with the nursery pack. Now I can't place items in build mode. When I choose my item and go to drag it to place, it disappears. I have to save and exit y game, then go back in to get anything to place. It happens after I delete and item or place an item. I am on PC but never had mods or CC. System is updated to the most recent version.