Rocket Racing map can't be joined, UEFN shows project size "ERROR: See Output Log"

Please select what you are reporting on:

Creative

What Type of Bug are you experiencing?

Assets

Summary

Rocket Racing map UEFN sessions cannot be joined, starting the session works but player gets kicked without ever fully joining.
Clicking Project > Project Size in UEFN says “ERROR: See Output Log”

[2024.08.19-14.35.57:974][558]LogValkyrie: ProjectSizeRequest::Prepare for 7a216ab0-49da-b3ed-ab05-2aaf01fab29e
[2024.08.19-14.35.57:974][558]LogValkyrie: ProjectSizeRequest for 7a216ab0-49da-b3ed-ab05-2aaf01fab29e: GetRootModuleInfo
[2024.08.19-14.35.58:301][596]LogValkyrie: ProjectSizeRequest for 7a216ab0-49da-b3ed-ab05-2aaf01fab29e: GetProjectContentPackage
[2024.08.19-14.35.58:544][624]LogValkyrie: ProjectSizeRequest::GetProjectUploadSize for 7a216ab0-49da-b3ed-ab05-2aaf01fab29e
[2024.08.19-14.35.58:679][640]LogValkyrie: ProjectSizeRequest::GetProjectDownloadSize for 7a216ab0-49da-b3ed-ab05-2aaf01fab29e
[2024.08.19-14.35.58:867][662]LogValkyrie: ProjectSizeRequest::Cancel for 7a216ab0-49da-b3ed-ab05-2aaf01fab29e - Content (re)cook error errors.com.epicgames.cookplugin.cookfailure.
JOB_ID=7c209729-00f0-4964-9f9c-bf4c6dc4b8ba

Steps to Reproduce

Open map in UEFN editor, try to launch & join the session
And pressing “Project > Project Size”

Expected Result

Being able to join and play UEFN Rocket Racing map
Seeing project size

Observed Result

Client gets kicked during loading and cannot rejoin
Project size shown as “ERROR: See Output Log”

Platform(s)

UEFN Windows 11, tested on 2 different machines

Island Code

6126-3930-0814

Additional Notes

https://create.fortnite.com/4014d5cb-a7d8-4c22-a2b6-3020aa25edda/projects/b903ddf1-4b6f-1f03-3da7-4a8dca697082/releases

RESOLVED

After contacting Epic they fixed something on their end and map started working today.

Thank you!