Trouble Creating Product Variations in WooCommerce – Invalid Attributes Error

Hey everyone :waving_hand:
I’m having trouble generating product variations in WooCommerce using Make.

Here’s a look at the flow I’m using:

I’m pulling data from Google Sheets, where the variation values (Sizes) are listed in a single cell like this:
S,M,L,XL

I’m using an Iterator to split these values and feed them into the “Create a Product Variation” module. The iterator appears to work correctly — it outputs the expected values individually.

However, when it gets to the “Create a Product Variation” step, I get this error:

Error: 400 - Invalid parameter: attributes (rest_invalid_param)


I’ve made sure the attribute is marked as “used for variations” in the “Create a Product” step and that the name matches exactly.

Any idea what I might be missing? Thanks in advance for your help!