Pinning to Pinterest

Hi, I seem to be having a problem when trying to Pin images from my site using Unicon to Pinterest.
I’ve tried using different browsers but I can’t get Pinterest to recognise any of the images on the site.
I’ve installed the PIN button on my browsers from the Pinterest site (https://about.pinterest.com/en/browser-button) but no matter what page I select on my site (www.productrenders.co.nz) its always comes up with the same error:

“Sorry, couldn’t find any pinnable things on this page.”

I’ve done a bit of reading and it seems there could be an instruction on the site telling Pinterest not to share images?

“not contain an inline nopin=true attribute”

It might not be this but if it is how can I remove it?

Thanks

Ticket