Survey / Test Mode used to work but now is blank. Upload function below will not upload .tiff or .pdf screen shot; “something went wrong”.
I am very sorry to hear about the troubles that you are experiencing with the Test mode and the preview window. I did jump into your account and saw the survey that was the most recently edited is in an old theme. In order for everything to work as it should, you will need to update your theme. Here is a link that will show you more on how to do this:
Can you update your theme builder then test out the preview mode and test mode?
Hope this helps!