Republishing a survey that was functioning fine and this came up......

I have not altered file or folder locations and names in AGOL or survey connect. I only added an image to the media folder and added a file row to the XLS with media:image file name.
Any Ideas?
All of the prior Code 400 threads don't seem to be applicable here.
Is this the result of adding a media file to a prior published survey that did not have media?