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Summary

Since the last update about two months ago, the following problems have occurred: connection issues with Fortnite, test sessions failing to start, and Unreal crashing completely. Project publishing also fails because the memory usage cannot be calculated.

Please select what you are reporting on:

Unreal Editor for Fortnite

What Type of Bug are you experiencing?

Other

Steps to Reproduce

Title

UEFN crashes when opening a new blank map and launching test sessions after the latest update

Steps to Reproduce
Open UEFN.
Create a new blank island/project.
Wait for the map to load.
UEFN crashes while opening the new blank map.
If the project opens, click Launch Session.
Fortnite/UEFN crashes before the test session starts.
Try to run Memory Calculation.
Memory Calculation fails to start or complete.

Expected Result

Since the latest UEFN update, launching a Fortnite test session causes a crash. Memory Calculation is also not working.
A new blank map should open successfully. Launch Session should start a Fortnite test session without crashing, and Memory Calculation should complete successfully.

Observed Result

Launching a test session causes Fortnite/UEFN to crash. The session never starts. Memory Calculation also fails to start or complete.
UEFN crashes when opening a new blank map. If the project opens, launching a test session also causes a crash. Memory Calculation does not start or complete.

Platform(s)

PC, windows

Video

Additional Notes

Additional Information

The issue occurred after the latest UEFN update. It affects both new, empty projects and existing ones. Due to these problems, publishing is not possible, so I cannot provide an island code.

hi @CIMBOM187

If you have trouble on blank project then follow instructions

“Failed to connect to beacon” upon launching session - General / Issues and Bug Reporting - Epic Developer Community Forums

if this is still failing then the personal install path is corrupted

  • please clear the following directory and try again.

%LOCALAPPDATA%/UnrealEditorFortnite

The directories will be created for the latest version

Hello @Jimbohalo10,

Thank you for your response.

I have already tried both of the suggested solutions. Since I actively follow the Epic Developer Community forums, I had already seen the post regarding the “Failed to connect to Beacon when starting a session” issue and followed the recommended steps. Unfortunately, the problem still persists.

I also deleted the %LOCALAPPDATA%/UnrealEditorFortnite directory as recommended so that UEFN could recreate the files on the next launch. Unfortunately, this did not resolve the issue either.

The crashes still occur when opening a new blank project, launching a test session, and attempting to run Memory Calculation. The issue started after the latest UEFN update.

Thank you for your assistance, and I appreciate any further suggestions or investigation into this issue.