We use pop up module by Rolige, https://addons.prestashop.com/en/promotions-gifts/41771-smart-popup-newsletter-popup.html.
It has worked great for years, but with the latest bleeding edge update, we now get the below error. I checked with the developer and he, as I expected, will only provide minimal support since this is not actually prestashop. He did advise that this issue is usually caused by a permissions issue. His actual words "file permissions, be sure that all your files are accesible, normally 0755 for directories and 0644 for files."
My question is likely for @datakick, but is there something related to newsletter subscriptions that would have changed in the latest bleeding edge versions and would have caused this issue? If so, ho would I resolve it?
I appreciate the help.