Checkout Button does not work

Hi,

We would need more information to be able to help since the button works fine on our end.
Could you provide a link and a user account so that we can access the page you're talking about and look at the issue ?
Also, it's probably linked to the template or because you're using a third party cart module. So try switching to the default template of Joomla temporarily to check that it comes from that.
If that's the case, updating the template override of the cart module should solve the problem.