It could be possible that this is a local issue. We suggest you try in a incognito mode and try some local troubleshooting. Clear the cache and cookies Try on another web browser, AND try within the browser's incognito mode. Ensure the web browser is up to date on the latest version Try another device, such as another computer or a cellphone. Try on the Shopify Mobile app. Try another internet connection (example, switch to a cellular network on a phone rather than wifi.) Ensure there are no pop ups being blocked in the web browser. Make sure you do not have any firewalls, VPNs If you still can't proceed to checkout, please contact us at service@nillkin.cc and we'll do our best to troubleshoot as soon as possible.