Hello Paul,
Thank you for getting ak to me so quik.
Please find url and login information, I have enabled the System - SP PageBuilder plugin, from the front end if you click the iew Button of any of the submissions and scroll all the way down you will see the signature images you will see that it is not being displayed.
From the Administrator back end if you disable System - SP PageBuilder plugin and then go back and check again you will see the signature image is now displayed.
Feel free to play around as its just a temp site, my lie site is only localhost.
Thank you in advance,
Craig