How can I fix the error of unsynced fulfillment in Walmart orders?

[evelasquez]

Hello. I am getting the below error message on multiple orders. How can I fix this?

The Shopify fulfillment for 1 line item(s) was not synced to Walmart as the tracking url was not specified. Correct the tracking information and try again.

[Sophia]

Hi, @evelasquez.

Sophia here from Shopify. Welcome to the Shopify Community!

Are you using the Walmart Marketplace app? If so, I recommend emailing the app developer at WMA_Support@walmart.com.

I wish I could provide some insight on this error message, but it's not one that I've come across before. I trust that the app developer will be able to investigate further with you. If you reach a solution with them, please feel free to follow up here! I'm curious to know what's causing this and I'm sure the rest of the community would appreciate it too.