# Stürzt ab beim starten einer sitzung

**URL:** <https://forums.unrealengine.com/t/sturzt-ab-beim-starten-einer-sitzung/2737005>\
**Category:** Issues and Bug Reporting\
**Tags:** fortnite-creative, unreal-editor-for-fortnite, fortnite\
**Created:** [July 20, 2026, 10:13am UTC](https://forums.unrealengine.com/t/sturzt-ab-beim-starten-einer-sitzung/2737005 "2026-07-20T10:13:09Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![CIMBOM187](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/cimbom187/32/1194969_2.png) [@CIMBOM187](https://forums.unrealengine.com/u/CIMBOM187)\
**Post date:** [July 20, 2026, 10:13am UTC](https://forums.unrealengine.com/t/sturzt-ab-beim-starten-einer-sitzung/2737005/1 "2026-07-20T10:13:09Z")

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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

> **[2026-07-20 12-59-23.mp4](https://drive.google.com/file/d/13Nw_mAOhvHK4v94JoCqgaoVvggLeo8UP/view?usp=sharing)**
>
> Google Drive file.

> **[2026-07-20 12-54-19.mp4](https://drive.google.com/file/d/1KD1OAQRl7DsP2wImo0Zjdn_Fykd3YB8-/view?usp=sharing)**
>
> Google Drive file.

### 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.

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<div class="post-metadata">

**Author:** ![Jimbohalo10](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/jimbohalo10/32/961440_2.png) [@Jimbohalo10](https://forums.unrealengine.com/u/Jimbohalo10)\
**Post date:** [July 20, 2026, 10:35am UTC](https://forums.unrealengine.com/t/sturzt-ab-beim-starten-einer-sitzung/2737005/2 "2026-07-20T10:35:52Z")

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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](https://forums.unrealengine.com/t/failed-to-connect-to-beacon-upon-launching-session/2727312/8)

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

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<div class="post-metadata">

**Author:** ![CIMBOM187](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/cimbom187/32/1194969_2.png) [@CIMBOM187](https://forums.unrealengine.com/u/CIMBOM187)\
**Post date:** [July 20, 2026, 11:29am UTC](https://forums.unrealengine.com/t/sturzt-ab-beim-starten-einer-sitzung/2737005/3 "2026-07-20T11:29:50Z")

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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.