Urgent Shopify Checkout Fix

My Shopify store is built on a custom Liquid theme and I sell digital products only. Sometime today the checkout button disappeared entirely, so customers can add items to the cart but cannot complete their purchase. No error messages show— the button is simply not visible.

I need a developer who knows Liquid, theme-level JavaScript/CSS, and the usual suspects (app conflicts, cart settings, dynamic checkout blocks, etc.) to jump in right away, locate the cause, and restore the button across all devices. A quick video or screenshot confirming the button is back in place and fully functional will be the final sign-off.

If you have solved this exact “checkout button not visible” issue before, please tell me how soon you can start and roughly how long you’ll need once you have theme access.