editor crashing on startup after 38.00 update

General Issues and Bug Reporting
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1

Summary

Fatal error: [File:Z:\UEVFS\Root\Engine\Source\Runtime\RenderCore\Private\RenderingThread.cpp] [Line: 823]
Rendering thread exception:
Fatal error: [File:Z:\UEVFS\Root\Engine\Source\Runtime\Renderer\Private\ShaderBaseClasses.cpp] [Line: 248]
Failed to find parameter collection buffer with GUID ‘8CC222B44C6842ABBBD7B5A51B4DECE7’ for /Game/TimeOfDay/TODM_Sequence/Materials/Sky/MI_UEFN_Sky_Ch5.MI_UEFN_Sky_Ch5.
Currently 5 listed default instances:
0x000001DCD6B76990: MPC_UIKit_InputFieldCaretColor: 4276CB2D41D48DFD7AE477B6AAB71B67
0x000001DCCCFA3240: MPC_Water: B5A9ACFF4B0499E786A4F981E5B966F6
0x000001DCCD42D9B0: FortniteMaterialParameters: A49449A349668D6F22FD2DA33BB9124E
0x000001DCCD4232A0: Stencil_ID_Definitions: 044A64DD437E451F386E4F8EE322E501
0x000001DD44B800F0: MPC_FrontendUI: 7A32DC7A4DF6A575A68D2C899F3636A5

0x00007ffb110247bf UnrealEditorFortnite-Engine-Win64-Shipping.dll!UnknownFunction
0x00007ffb1102af07 UnrealEditorFortnite-Engine-Win64-Shipping.dll!UnknownFunction
0x00007ffb1102b035 UnrealEditorFortnite-Engine-Win64-Shipping.dll!UnknownFunction
0x00007ffb10a91d47 UnrealEditorFortnite-Engine-Win64-Shipping.dll!UnknownFunction
0x00007ffb10a9fd1b UnrealEditorFortnite-Engine-Win64-Shipping.dll!UnknownFunction
0x00007ffb10aa7c6d UnrealEditorFortnite-Engine-Win64-Shipping.dll!UnknownFunction
0x00007ffb10e541f2 UnrealEditorFortnite-Engine-Win64-Shipping.dll!UnknownFunction
0x00007ffb10e58935 UnrealEditorFortnite-Engine-Win64-Shipping.dll!UnknownFunction
0x00007ffb10e4e6cd UnrealEditorFortnite-Engine-Win64-Shipping.dll!UnknownFunction
0x00007ffb10e63e2c UnrealEditorFortnite-Engine-Win64-Shipping.dll!UnknownFunction
0x00007ffb10ef72bc UnrealEditorFortnite-Engine-Win64-Shipping.dll!UnknownFunction
0x00007ffb10f4b0d6 UnrealEditorFortnite-Engine-Win64-Shipping.dll!UnknownFunction
0x00007ffb10f4c35f UnrealEditorFortnite-Engine-Win64-Shipping.dll!UnknownFunction
0x00007ffb12984242 UnrealEditorFortnite-Engine-Win64-Shipping.dll!UnknownFunction
0x00007ffb11dd25ca UnrealEditorFortnite-Engine-Win64-Shipping.dll!UnknownFunction
0x00007ffb133323a3 UnrealEditorFortnite-Engine-Win64-Shipping.dll!UnknownFunction
0x00007ffb13341f2d UnrealEditorFortnite-Engine-Win64-Shipping.dll!UnknownFunction
0x00007ffb086a29e7 UnrealEditorFortnite-Engine-Win64-Shipping.dll!UnknownFunction
0x00007ffb13440321 UnrealEditorFortnite-Engine-Win64-Shipping.dll!UnknownFunction
0x00007ffb13353c9a UnrealEditorFortnite-Engine-Win64-Shipping.dll!UnknownFunction
0x00007ffb1335412a UnrealEditorFortnite-Engine-Win64-Shipping.dll!UnknownFunction
0x00007ffb136acf67 UnrealEditorFortnite-Engine-Win64-Shipping.dll!UnknownFunction
0x00007ffb136ac4a9 UnrealEditorFortnite-Engine-Win64-Shipping.dll!UnknownFunction
0x00007ffc0911259d KERNEL32.DLL!UnknownFunction

Please select what you are reporting on:

Unreal Editor for Fortnite

What Type of Bug are you experiencing?

Other

Steps to Reproduce

open editor

Expected Result

editor open

Observed Result

editor crash

Platform(s)

PC

2

Hi @MirandaMora77 have you tried verifying your files?

3

i have and that does not fix the issue

4

FORT-1006651 has been created and its status is ‘Unconfirmed’. This is now in a queue to be reproduced and confirmed.

5

Ok, we’ll get someone to take a look.

6

Could you send me your UEFN logs? How to get your Fortnite logs

7

Same happening here, a quick fix will be much needed :slightly_smiling_face:

8

Same issue here. Same exact error as well, along with the rest of my team. We’ve tried verifying, reinstalling, still happens.

However one of our members last loaded the editor on low scalability and can load it just fine, everyone else still has the issue.

9

I’m seeing same crash now on latest update too.

10

UnrealEditorFortnite-backup-2025.11.01-17.43.05.log (1.3 MB)

1 Like
11

UnrealEditorFortnite-backup-2025.11.01-19.24.56.zip (344.3 KB)

1 Like
12

Hey folks could you try this?

  • Navigate to the Fortnite client menu
  • Go to OPTION
  • Enable downloading High-Res textures
  • Click Apply
1 Like
13

That worked, thanks @Flak !

14

That worked, Thanks Flak

15

I can’t even get to the client menu