UEFN crash when opening project since 21.00

General Issues and Bug Reporting
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1

Summary

Since 21.00 UEFN has been very unstable, it was crashing occasionally when pushing changes, now it is crashing consistently when trying to open the project.

Please select what you are reporting on:

Unreal Editor for Fortnite

What Type of Bug are you experiencing?

Stability

Steps to Reproduce

  1. Open my UEFN project

Expected Result

Not crash

Observed Result

Crashing

Log callstack: [2026.06.18-21.06.55:577][534]LogOutputDevice: Error: === Handled ensure: ===[ - Pastebin.com

Platform(s)

Windows

Island Code

7142-4719-9129

Upload an image

Screenshot 2026-06-18 221258.png
Screenshot 2026-06-18 221258.png741×594 29.4 KB

Additional Notes

I have the dump file and full log, but I assume you probably won’t want to download random files from me.

4

This seems to be solved now, I reinstalled UEFN and resynced the project.

5

Thank you for letting us know :slight_smile: Glad you got it sorted.

6

FORT-1122677 has been ‘Closed’. The issue reported is not caused by a bug in the tool.