How to get your Fortnite logs

At times, we will ask you to send us your logs when you’re having an issue in UEFN. Here is how to do that:

UEFN Logs

  1. Exit Fortnite.
  2. Click on Start or press the Windows Key + R.
  3. Type \AppData\Local\UnrealEditorFortnite\Saved\Logs and press Enter.
  4. Zip your Logs folder and attach the zip file to your reply.

To find UEFN Logs while working in UEFN:

  1. Click “Output Log” at the bottom of the window.
  2. Click on “Setting” at the top right of the window
  3. Click “Open Source Location”
  4. Zip your Logs folder and attach the zip file to your reply.

Fortnite Game Logs

If you are playing on a PC:

  1. In the search field in the bottom right corner, type (or copy/paste) *%localappdata%\FortniteGame\Saved\Logs*
  2. Press the Enter key
  3. Attach the following files to your reply or DM
    FortniteGame
    FortniteLauncher
    FortniteGame-backup-[date]

Please let me know if you have any questions!

Crash or freeze problems for no reason
Blocker - I can't launch game session.
Crashing, App stays running after crash/closing.
UEFN Moderation Warning opens an Empty Blank Tab instead of a list of Moderated Assets
Critical - Matchmaking Play - Extreme Lag
crash in uefn
CREATIVE HUB BUG (PLEASE READ THIS)
UEFN not launching
MAJOR - Editor disconnecting in between rounds in edit sessions!
MAJOR - Editor disconnecting in between rounds in edit sessions!
Creative session doesn't load when you connect to platform
Crash when trying to open a specific project in UEFN
can hit objects through walls and barriers with hammer
Guards are not responding to patrol paths or navigating the map depending on player distance from spawner.
Uefn crashes at 90% loading no matter what i do it will always give me logout text.
Does anyone know why I have been unable to load into my session in UEFN since Chapter 6 started? I have been working on this map for a long while now and don't want to lose it to errors like this. Help would be greatly appreciated!
UEFN locked at 90%
Storm in UEFN Edit Mode
Inconsistent lighting mismatch between viewport and launched Fortnite session.
[URGENT] Island passing "MATCHMAKING ERROR #1" when trying to queue.
Round based games gets stuck on cycle of round starting and ending instantly
Session Does Not Start after v39.00 for a specific project
throttling issue with GPU’s on uefn
editor is not connected
Game Stuck on “Preparing” When Loading from Lobby – UEFN Issue
Havoc Hotel 3 coming up with an error reading "Content Beacon Error"
TMNT City Sample - Broken
IK Retargeter Causing UEFN To Crash
TMNT City Sample - Broken
UEFN NOT STARTING UP
CANT ENTER TO MY UEFN MAP
Adding Tags to Devices is crashing Fortnite
Can't publish due to "Experimental Features". Even though they're off
Shaders are reloading everytime I move a node or open a material, instance, or function.
Can't get into a private version
Can not publish iOS: Failed to prepare data
Undo button very glitchy
[CRITICAL ERROR] Memory calculation fails to run
BLOCKER - Not able to join a precise island
Players losing their score
Players can become stuck in a "hiding" animation after using a Hiding Prop Device
[MAJOR] UEFN “Cooker Out of Memory” / “Cook Timeout” Errors Persist and Worsen After Patch 38.00
[MAJOR] Cook Failure Out Of Memory
UEFN Freezes After Memory Calculation (Today’s Update)
CRITICAL BUG - Clicking on Landscape tool causes UEFN to completely freeze!
Unreal Revision Control error: Failed to load fragment payload
Matchmaking Error! (joining UEFN experiences)
UEFN Crashes on Launch — Feature Level 5 Not Detected Despite RTX 2080 SUPER
Cooking Errors after 35.00
EXCEPTION_INT_DIVIDE_BY_ZERO
UEFN Crahses when opening any project after v37.00
editor crashing on startup after 38.00 update
Proximity chat not enabling when attenuation is set to ON
Test Players In Creative/UEFN Being Eliminated Causes A Crash
[CRITICAL] Cannot update my map with private versions made after 38.00
Audit Tools Crash UEFN
[MAJOR] Cook Failure Out Of Memory
Proximity chat not enabling when attenuation is set to ON
TeleportTo error: An unknown error occurred. If this happens frequently, contact Epic support.
UEFN crashes when loading a project
Failed to upload due to already running ???
Launching Memory Calculation... [PROBLEM]
Player reference device not showing player's skin who is wearing kicks
Start game/End game buttons sometimes disappear for no reason in the game sidebar menu
Stuck at 38% Sync
Constrained objects in level sequence crashes live session
UEFN MEMORY CALCULATION ERROR
Stat to Apply in Stat Creator not Appearing in Stat Powerup as Option
[CRITICAL] Unreal Revision Control Bug where you cannot go to the newest version
PING and map loading problems
UEFN MEMORY CALCULATION ERROR
Can’t launch session (GetFilenameOnDisk returned a non-matching filename)
BP's inherited from a Child of a Prop fail verification
UEFN island crash when PutInStasis is called on a fort character spawned from an NPC spawner device - 39.00
Unhandled Exception: EXCEPTION_ACCESS_VIOLATION writing address 0x0000023e5346507c
HLOD Build Failed
UPDATE CRASH: Shader compilation failures are Fatal.
"We Hit A RoadBlock" | UEFN Session infinite Loading / Won't launch
MAJOR - Editor disconnecting in between rounds in edit sessions!

For future reference, if we ask for UEFN logs please find them here: \AppData\Local\UnrealEditorFortnite\Saved\Logs. Thanks!

Would really be useful if when it crashes there was an option to just open log folder directly from crash report.

2 Likes

There is also a helpful new tool for uploading logs. If you go to Help → Report Issue in UEFN it should take you to a folder that contains your logs zipped up. Thanks!

2 Likes

In regards to the above, let us know if you have any issues with it. I’ll get it in the tutorial.

Is this something I can do even if the project thats crashing it wont open?
Can I open a working project or a new one and still get the Log info you need?

Hey @TheAweDam if a project isn’t able to open it might not be helpful to use the Report Issues button since opening a different project will likely cause you to zip up the logs that were created when opening the different project (not the ones that contain the crashes). If your project is crashing on opening you may need to grab the logs manually. Thanks.

1 Like

Thank you!

Updated original post for some changes.

1 Like

I added a nice suggestion in the recommendations forum posts Here

Would help everyone out :slight_smile:

OP Updated

@Flak @HalcyonKnight96 @
Where can I send the logs because I have a problem since yesterday, when I want to run my map, it loads to 36% and crashes

You can message me Aminko and send me a link to a post on the forums that explains the issue!

How can I write to you? Sorry, I’m new. @kalishane_eg

How do I send you the compressed files here?

Hello, I’d like to contact support. There’s a problem with one of my projects. Sometimes when the player logs in, they appear without building materials, and other times they can build, and also sometimes they can’t build at all. Is there a problem? Also, the point rewards aren’t working.

I compressed the files you explained to me.

Construction problem

FortniteGame-backup-2025.12.12-16.11.35.zip (1.5 MB)

My island code : 8344-3234-4721

I am having a problem with construction. Construction resources appear as zero and I cannot build. When I logged in with another device, they appeared but then disappeared. I cannot understand what the problem is. Everything is programmed correctly. This is the island code and the files you mentioned.

8344-3234-4721

FortniteGame-backup-2025.12.12-16.11.35.zip (1.5 MB)