errors.com.epicgames.creator-portal-api.missing_thumbnail_url Thumbnail URL is missing for project

Summary

When I publish my map, it gets rejected because of this problem, which is usually related to the thumbnail image, but I don’t know the exact reason.

Please select what you are reporting on:

Unreal Editor for Fortnite

What Type of Bug are you experiencing?

Publishing

Steps to Reproduce

1- Go to the Creators Portal 2- and publish a specific map with a thumbnail image 3 - try to publish it

Expected Result

then the problem arises: the launch fails, and then the problem arises.

Observed Result

that my map is publishing

Platform(s)

https://create.fortnite.com/dbd61c8f-6269-46f4-9de6-685170cefb71/projects/4d28de1b-4c35-c98e-2a91-12ac8c472082/releases?applyCert=0975-4152-7877