Pirate Forms Not Working on Mobile – Sorry An Error Occured

Hi, I’m using the latest version of both wordpress (4.9.8) and pirate forms (2.44)
and the forms aren’t working on the mobile versions of my site. It tests on desktop in safari, firefox & chrome with no problem. But on mobile I’m just getting “sorry, an error occured.” every time I hit submit. I’ve tried it on my iphone and ipad on safari and firefox and get the same results.

I’m not sure when I last tested the forms on mobile, I’ve been using it for quite a while. I have recently made changes to the website to optimize it, I’ve added the Async Javascript and Autooptimize plugins from Frank Goosens… could they have played caused this error?

I tried rolling back to the 2.43 version and that didn’t fix it, so it’s back at 2.44 now.

Any help would be greatly appreciated.

Thanks

David.

The page I need help with: [log in to see the link]