[solved] "Something went wrong" / "Not found" error when trying to add to cart

Shopify Discussion

Topic summary

A user encountered an error where adding a product to cart triggered a “Something went wrong / Not found” message, though the item was still added. The cart page failed to load.

Root Cause:

  • The product’s variant option name was set to “Format”
  • This caused a backend conflict in the Brooklyn theme

Solution:

  • Changing the option name from “Format” to something else (e.g., “T-shirt size”) resolved the issue

Follow-up Discussion:

  • Another user reported similar symptoms but with a different option name
  • Original poster clarified this indicates a different underlying problem
  • Recommendation: Contact Shopify support or hire a developer for cases with different configurations

The thread is marked as solved for the specific “Format” option name scenario.

Summarized with AI on October 30. AI used: claude-sonnet-4-5-20250929.
1

I had a product that, when you try to add it to your cart, you get a Shopify error message instead of being taken to your cart:

Something went wrong

What happened?

Not Found: The page you were looking for does not exist.

The product would still be added to the cart, but the cart page wouldn’t load.

After a few days’ worth of troubleshooting, I tracked down the issue to the fact that the Option name (i.e. the heading for variants) was set to “Format”. In my very old Brooklyn theme, this must do something on the back end that caused the cart to not load.

I’m posting this here in case anyone else encounters this issue in the future.

2

Can you give like an exact way to solve the problem??

3

As mentioned in the original post, the problem resulted from the Option name within the product being set to “Format”. Changing this to something else (e.g. “T-shirt size”) resolved the problem.

4

But the thing is that my option name in my product is not set to “Format”.

5

Then it sounds like you are experiencing a different problem. Reach out to Shopify tech support or hire a Shopify developer.

6

ok