Last verified 2026-07-14
shopify app proxy breaking cart ajax
The actual problem
An app proxy or custom cart.js conflict returns HTML errors — ATC looks fine until cart is empty.
Do this
- Watch Network on ATC/cart change for non-JSON responses.
- Disable the newest app proxy route until cart AJAX is green.
- Pin working app versions during paid campaigns.
- Add cart-line-item count smoke test post-deploy.
Tools for this job
- Tillkiln
Storefront/cart trap detection
- Cashkiln checklist
Pre-ads operator checks
Related intents
Also from Cashkiln
- Netkiln — paste a payouts CSV → public fee health page ($19 unlock)
- Tillkiln — scan checkout leaks before you buy more ads
- Free leak checklist — six operator checks
Deep-dive report — $29
Self-serve checklist expansion for this query family. PayPal Checkout. No call.