Just had the same problem! Somebody help us!!
Can you guys tell us what setup you have in your comps? Did you get that in the console? If not, could you check the console and tell us what you see there?
If this is with the software itself, could you try to reset your preferences? see here: Restore preferences | Edge Animate
Actually i had a link that i needed to update so i erased all the assets i had uploaded to the doc library and restarted my animate and it worked fine! i think it was a problem with the link but the error message appeared in a dialogue box in animate repeatedly, like 20 times in the beginning and then when selecting objects like three times each. i hope someone can find a solution because that process took like 15 minutes to sort out. not something you want to happen in a crunch. good luck!
It seems to happen when Animate is used for the first time after the last upgrade. It happened to me too, ad was very annoying, but stopped after restarting. Here is a screen shot:
That alert was displayed three times every time I selected or unselected any object, and many more times on startup and closing Animate. I was unable even to stretch a motion tween using the mouse!