Why is my 'Add to Cart' function not working on different browsers?

My core add to cart functionality stopped working. I get “page isn’t working” errors in Chrome and IE and blank page in Firefox.

https://susscookieco.com/products/corporate-gifting

It currently only works on pages where I hard-coded the form code on a page

https://susscookieco.com/pages/gift-cards

When I inspect the page and view the console while adding to cart I see a 400 bad request error and something about “strict-origin-when-cross-origin” and a reference to cloudflare. Maybe something with a CDN is causing a conflict?

Any help would be extremely appreciated.

After hours of trial and error I narrowed it down to a conflict from the GiftShip App. If anyone else experiences a similar issue try disabling apps. So I’ve got this resolved for now :slightly_smiling_face: