Created survey, published, all was well and it was working. I made an update to the Thank You Screen (post submission) in the designer window, and now I can't republish. Unfortunately, the error as to what is going awry isn't helping. Has anyone gotten this error message? I can provide more details if you need. Thanks.
The error code says only:
And that's it.
I think you need to do a bit of troubleshooting. Look at the image format and ensure it was added from the insert ribbon, not copy pasted etc.
Try a different image, save as a different format, look at image size, resolution etc. That will give you more to go on.