I think Im losing my mind here.
Click the button. The overlay doesnt workthe form redirects to another page. I cant see anything wrong.
Exact same code. Just a different filename. Works fine.
I deleted cart11.html and renamed test.html to cart11.html. Then it doesnt work anymore. I rename it back to test.html and it works fine.
Links seem to work okay, its just the form submitting. Shop.html seems to work fine, so I can use that filename, but there seems to be a problem with cart-named files. Seems pretty nutty to me.