Why is my checkout button not working on my ecommerce site?

My checkout button cannot work after I add my product and go to the checkout page. the website link cannot transfer to the checkout page when I clicked the checkout button in the cart. I tried different devices with incognito different browsers different internet lines even different themes if in the case was some broken code in my theme.NOTHING worked. A lot of add-to carts no sales if someone knows please fix it.My store is (podt-rexstore.myshopify.com)

There is an active issue on Shopify regarding this. If you add value="checkout" to the button HTML, it has fixed the issue for some people.