The "Owning obj" is "cloud", so I think it might be possible that a cloud was accidentally moved out of bounds when starting BA.
I dunno though. Can't you just ignore it or something and continue playing?
The error kept popping up every few seconds, so it would have been a real pain to try and keep playing.
Edit: It seems to re-occur at times when I start a new world (keep having crashes when I attempt Wolfing/Feral runs, so I've been making new worlds fairly often), so I wonder if it's something to do with the general timing of when I'm injecting COBs and/or uploading Better Albia that somehow is messing with clouds.