Object [Object Object] has no method stringify

Object [Object Object] has no method stringify

I've been working with a fairly simple animation, powered by Adobe Edge
Animate, on my site for a while now. I didn't change anything to do with
it for the longest time, but something's obviously happened, because now
when i run the animation, i get
Uncaught TypeError: Object [object Object] has no method 'stringify'
edge.2.0.0.min.js
from Chromes Console Log. I have no idea what this means, but it has
something to do with the json. I'm not sure if my image is being loaded,
but there's no reason it shouldn't be, since i never changed the path of
it. Can somebody tell me what "Object [object Object]" is supposed to
refer to?
Thanks!
P.S My animation setup is just the stage, with about 17 copies of an .svg
that i use as a sprite sheet, plus some text. Every single object has
animations that includes opacity, top, left, and height.