Cook failure

General Issues and Bug Reporting
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1

Summary

Hello, I am currently unable to start session, getting cook failures, it’s been like this for days. Here’s the error message to be specific.

CookJobId: 5f6e875a-ca6a-4719-bc88-6806395aa465
An error occurred while communicating with the game servers (failed to cook module 70567e26-4e33-f4bc-ea65-d5b65edfc746 (artifact b444f4aa-e4ff-480e-beed-58bfa9013291:linux-server) (cookJobId 5f6e875a-ca6a-4719-bc88-6806395aa465) with error code errors.com.epicgames.cookplugin.assetvalidationerror)

Please select what you are reporting on:

Creative

What Type of Bug are you experiencing?

Assets

Steps to Reproduce

Start a session in uefn

Expected Result

Session starts normally

Observed Result

Error

Platform(s)

windows

2

same here, they haven’t really fixed anything unfortunately, this is the specific error i’m getting

Screenshot 2025-05-10 104950
Screenshot 2025-05-10 1049501269×102 3.14 KB

Screenshot 2025-05-10 112145
Screenshot 2025-05-10 112145936×112 2.65 KB

4

I’m not sure if it’s related, but after v35.00(the same one where the cook failure appeared) I can no longer build HLOD and the World Partition Minimap (it gets stuck at 7% for over 9 hours, whereas before v35.00 the same project completed the build in under 30 minutes), and in some projects UEFN crashes when trying to sculpt the landscape.

5

getting the same issue…

6

Even on a fresh new world..

An error occurred while communicating with the game servers (failed to cook module 741e0a8d-4326-80a7-5e62-6d906db2357f (artifact b18e94ef-6c68-4a11-ac77-bdaaf2877947:linux-server) (cookJobId ef075059-97fe-4f25-8311-8e00a4ae2777) with error code errors.com.epicgames.cookplugin.assetvalidationerror).

7

same here

8

We’ll have someone investigate, thank you for the reports.

10

FORT-909151 is ‘Closed’ as ‘Fixed’. The issue will be addressed in 35.10.