Issue: On a zero-cost product checkout, the “Finalize order” button spins indefinitely on desktop. Clearing cache or using an incognito window fixes it; mobile checkout works.
Context and earlier assumptions: Changing the fulfillment app’s “location” did not resolve it. Theme or the digital product app (Uplinky) were considered possible causes.
Latest findings: Errors appear tied to Express Checkout (accelerated payment buttons) and Google Pay (GPay) not responding, leading to AJAX 404 responses. Screenshots provided show the error state.
Likely cause: A state/logic bug where the loading animation isn’t cleared after a failed request, potentially differing between desktop and mobile code paths. Some themes use separate/minified or transpiled JavaScript for devices, complicating debugging.
Suggestions/action items:
Use browser/mobile debugger to trace the failing network request and the code path handling Express Checkout.
Consider temporarily hiding Express Checkout as a workaround (may only mask the 404/timeout).
If unresolved, contact the theme and app developers.
Status: Unresolved. Merchant has opened a ticket with Shopify Support and is awaiting guidance.
Summarized with AI on February 19.
AI used: gpt-5.
The finalize order button gets stuck (spins and loads infinitely). It is probably a cache / cookie problem as clearing cache or using an incognito browser eliminates the issue. It also seems to work from mobile. I receive lots of complaints from users and no one was able to resolve the issue so far.
First we thought it was the “location” set by the app of the fulfillment companiy but we changed it and it still had the issue. Is it the theme, the digital product manager app (Uplinky), or something else?
This is probably a state bug with the code showing the loading animation. If you would like me to hunt and fix the bug for your theme, please message me.
I don’t think this could be resolved from outside Shopify, but I’m not sure. There are suggestions all over the web to hide Express Checkout but I think that will resolve the timeout issue for the 404.
We are in touch with Shopify support and waiting for their response.
Do you have any other ideas, suggestions now that you see what the problem actually is?
If it works properly on mobile, and when the cache is cleared, and the bug is narrowed to an ajax 404 error of some type, then my first goto would be to connect a mobile device to a debugger and see which code is run.
On some themes there is functional plurarity where for optimization purposes the code for the same function is essentially separate for mobile, or desktop ect.
Some developers write their code as though it’s system code and then transpile it to javascript. It’s easy to develop that way, but fixing transpiled code can be a pain. Luckily most shopify js is not obfuscated, and they’re kind enough to give minified(compressed) and uncompressed code.
Good luck. If however the problem persists, it would be best to reach out to the theme or add-on developers.
