Unfortunately no I didn’t get around to emailing aradadiya163 on this, but I found a workaround – I can just disable the plugin while I’m editing the page and then I can save it with no problems. It is only when the plugin is activated that it gives the error.
I’ll try to take a screenshot of it next time I am editing that page, although it is basically just the same error I quoted in my first post.
Resolved: I had no idea that a Storefront theme had been installed and activated. I was able to just reactivate my own theme.
Apologies. I’m new to this but it wasn’t exactly clear that this would happen automatically.
