Re: Horses keep disappearing, lots of errors and kicking me off to the world screen.
Yes it happened in a new save with no mods and previous saves installed as well. I didn't catch the full 102 error but I narrowed the problem down to the horses themselves. If I play any household without horses everything worked fine, even with mods. As soon as I added a horse or loaded in with one then the problem arose again.
But I finally fixed the issue.
The Missing Resource Error gave me an inkling that Horse Ranch didn't install correctly. I uninstalled Horse Ranch and installed it again. And yup, everything works again. Even with my previous saves and mods (all updated) put back in.