I checked your product page, and I can see you are having an email required field in your Product module, and it is conflicting with the embedded contact form.
Thanks for sharing your query here on our Community forums.
I’d definitely check out the advice shared by @GemPages above, as third-party apps and services like this are supported by their developers rather than by us here at Shopify so they would be experts in their own service.
If that alone doesn’t resolve the issue, could you let me know the name of the theme you’re using currently?
hi! reading over and saw u offered other solutions for the add to cart not working, i was using an upsell app and recently deleted it but im not sure how long the add to cart button has not been working because i just received orders recently… im using Debut theme. hope you can help thank you