Issue Overview
A WooCommerce store saw sitewide cart failures after a plugin update. Users couldn’t add any product to their cart—each attempt triggered an “Invalid product” error. This occurred despite no changes to product settings.
What We Found
JavaScript conflicts
DevTools showed errors tied to modal popups triggered by the “Add to Cart” button.
Plugin interference
The issue traced back to two plugins:
- WooCommerce Upsell Popup
- WooCommerce Upsell Popup PRO
Staging validation
Disabling these plugins restored normal cart behavior instantly.
How We Fixed It
✅ Disabled upsell plugins
Both upsell extensions were turned off to restore cart functionality across the site.
✅ Communication
Clients were informed that upsell features were temporarily disabled to allow seamless purchases.
✅ Isolated the root cause
The plugin tried loading a removed upsell product, blocking the entire cart flow.
✅ Planned next steps
Options included updating or replacing the plugin—or adjusting settings to avoid similar future conflicts.
Result
Cart and checkout functionality was fully restored within hours. Sales resumed, and a safe path was created for upsell reactivation or alternative solutions.
Experiencing errors with WooCommerce add-to-cart or upsell plugins?
Integriti Studio can help you troubleshoot and resolve plugin conflicts without compromising your sales.
Leave a Reply