I realize that this post is old, but I was actually looking to finally report the `Failed to load Household Inventory for household 1` bug. It does happen in a completely vanilla save if you have any imaginary friend in that save. If the imaginary friend has aged up, then the error stops. But if you have even just one imaginary friend in the entire save then you will get this error when you enter build mode from manage worlds and then exit back to manage worlds.
Is it worth my making a fresh post here for? Or is there another post that already exists that it would be better for me to reply on?
Thanks!