The Animator

I just spent a long time on this animation, but when I try to upload it to the gallery it gives me a pop-up message saying "Sorry, something went wrong and your animation was not saved. Please try again". It gives me this message over and over again--I've tried refreshing the page, exiting in and out of the editor, and doing other things to try and fix this bug, but it doesn't go away. I don't know what to do now.. if anyone can help me that would be gladly appreciated.