Hi bmos,
I have been getting these errors from AURA effects for several weeks now. The console errors jump up if the map has token with aura effects on and anything there moves at all.
Attachment 45852
I have tried to fiddle with different extensions on and off and sometimes it looks like the errors are gone but then they suddenly appear again with no apparent reason. The other extensions that check range in my setup are 'Token Height indicator', 'Automatic Flanking and Range' and I think 'Automatic Pack Tactics' checks the range too.
I was doing some prep work and everything went smoothly when I moved player token around as GM. The problem surfaced again when I moved one token as a player. (Token lock on). I think the problems begin each time when players start moving their tokens.