[Critical] Server's cooker stuck to a specific release.

Summary

After the release of update 42.0, FortPool completely stopped working, including the currently released version. Attempting to access the map results in an error, and it is impossible to load the game experience.

Original released island (Unlisted): 9311-9744-2560

The first time I launched UEFN after the patch, the project also started crashing in the editor. I therefore began a process of isolating and removing parts of the project to identify the cause.

Initially, I identified two issues.

The first one was a using{MyModule} statement referencing a submodule of the project. After removing this import and the associated code, the editor stopped crashing, allowing me to open the project and investigate the remaining issues.

Eventually, I had to clone the project, create a completely new map, and manually move the assets from the original map to the new one one by one. The original map still appears to be corrupted, even inside the cloned project.

After continuing to remove and isolate different parts of the project, the main destabilizing factor turned out to be a series of World UMG widgets used for the Cue Marketplace. Removing them was what ultimately allowed me to successfully publish the island again.

After three days of work, I managed to rebuild the map in a new project and republish it:

New island: 1414-8364-9088

Unfortunately, shortly before this issue occurred, I had also introduced in-island transactions. If the original map is unrecoverable, I would therefore also need assistance with refunding the players who made purchases before the map became inaccessible.

Additionally, in the Creator Portal, every release other than the currently active one is now marked as Cooking Failure. Because of this, I am unable to roll back the island to any previous release, including versions that were stable and fully functional before update 42.0.

I would appreciate it if the team could investigate what might have caused the original map/project to become corrupted after update 42.0, especially since the released version of the island also became completely inaccessible immediately after the update.

Please select what you are reporting on:

Unreal Editor for Fortnite

What Type of Bug are you experiencing?

Publishing

Steps to Reproduce

No idea

Expected Result

Join here: 1414-8364-9088

Observed Result

Join here: 9311-9744-2560

Platform(s)

In game any platform, Editor on Windows 11

Island Code

9311-9744-2560

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Additional Notes

I used AI to keep track and debugging the code, it has produced a complete report of everything has been tried in the past 3 days. I can share it privately as it includes information i deem sensitive.

FORT-1143955’s status has changed to ‘Ready for QA’. A member of the QA department is investigating the issue.

I’ve tried updating the original project after today’s update. The editor is way more stable but my serve module is still stuck with internal cooker error.
Assets and verse classes have been migrated from the working project, file .umap (and external actors folder) is the only file I’ve left untouched.

I’ve been able to unstuck the server’s module myself. Thanks for the support!