Didn’t work 
Topic summary
Stores report a widespread checkout failure where the cart page reloads on clicking checkout, starting around 11:00 and lasting hours; Shopify acknowledged the issue (including via Shopify Plus support) and set it to high alert with no ETA during the outage.
Workarounds:
- Replace the cart submit button with a static link to /checkout or change the cart form action to “checkout.” Theme files commonly edited include cart.liquid; for Kalles 2.3, cart_widget.liquid and cart-template.liquid, then disable the “Cart view” button.
- Disabling GTM (Google Tag Manager) was suggested by support but generally didn’t help; it may only apply to Shopify Plus accounts.
Side effects:
- Cart page logic may not run; returning from checkout to cart can re-stall; checkout may default to the site’s primary language.
Investigation:
- External analysis points to Shopify’s native “Trekkie” analytics file injecting a gtag from the GTM domain, implying the issue wasn’t caused by merchants’ GTM snippets.
Current status:
- Shopify announced the fix; users reverted changes and report normal checkout.
- One participant still faces a separate “checkout isn’t available—change plan” message, unresolved and likely unrelated.