# editor crashing on startup after 38.00 update **URL:** \ **Category:** Issues and Bug Reporting\ **Tags:** id, slug, closed, name\ **Created:** [November 1, 2025, 6:39pm UTC](https://forums.unrealengine.com/t/editor-crashing-on-startup-after-38-00-update/2670810 "2025-11-01T18:39:39Z")\ **Posts on this page:** 17\ **Page:** 1
**Author:** ![MirandaMora77](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@MirandaMora77](https://forums.unrealengine.com/u/MirandaMora77)\ **Post date:** [November 1, 2025, 6:39pm UTC](https://forums.unrealengine.com/t/editor-crashing-on-startup-after-38-00-update/2670810/1 "2025-11-01T18:39:39Z")
### 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 ---
**Author:** ![Flak](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/flak/32/769441_2.png) [@Flak](https://forums.unrealengine.com/u/Flak)\ **Post date:** [November 1, 2025, 7:06pm UTC](https://forums.unrealengine.com/t/editor-crashing-on-startup-after-38-00-update/2670810/2 "2025-11-01T19:06:29Z")
Hi @MirandaMora77 have you tried verifying your files? ---
**Author:** ![MirandaMora77](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@MirandaMora77](https://forums.unrealengine.com/u/MirandaMora77)\ **Post date:** [November 1, 2025, 7:25pm UTC](https://forums.unrealengine.com/t/editor-crashing-on-startup-after-38-00-update/2670810/3 "2025-11-01T19:25:31Z")
i have and that does not fix the issue ---
**Author:** ![Flak](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/flak/32/769441_2.png) [@Flak](https://forums.unrealengine.com/u/Flak)\ **Post date:** [November 1, 2025, 7:28pm UTC](https://forums.unrealengine.com/t/editor-crashing-on-startup-after-38-00-update/2670810/5 "2025-11-01T19:28:58Z")
Ok, we’ll get someone to take a look. ---
**Author:** ![Flak](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/flak/32/769441_2.png) [@Flak](https://forums.unrealengine.com/u/Flak)\ **Post date:** [November 1, 2025, 7:30pm UTC](https://forums.unrealengine.com/t/editor-crashing-on-startup-after-38-00-update/2670810/6 "2025-11-01T19:30:01Z")
Could you send me your UEFN logs? [How to get your Fortnite logs](https://forums.unrealengine.com/t/how-to-get-your-fortnite-logs/682382) ---
**Author:** ![SupremeUEFN](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/supremeuefn/32/1203386_2.png) [@SupremeUEFN](https://forums.unrealengine.com/u/SupremeUEFN)\ **Post date:** [November 1, 2025, 7:39pm UTC](https://forums.unrealengine.com/t/editor-crashing-on-startup-after-38-00-update/2670810/7 "2025-11-01T19:39:46Z")
Same happening here, a quick fix will be much needed 🙂 ---
**Author:** ![EDMIRE](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/edmire/32/975867_2.png) [@EDMIRE](https://forums.unrealengine.com/u/EDMIRE)\ **Post date:** [November 1, 2025, 7:40pm UTC](https://forums.unrealengine.com/t/editor-crashing-on-startup-after-38-00-update/2670810/8 "2025-11-01T19:40:46Z")
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. ---
**Author:** ![NoHoldsBarred](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@NoHoldsBarred](https://forums.unrealengine.com/u/NoHoldsBarred)\ **Post date:** [November 1, 2025, 7:41pm UTC](https://forums.unrealengine.com/t/editor-crashing-on-startup-after-38-00-update/2670810/9 "2025-11-01T19:41:17Z")
I’m seeing same crash now on latest update too. ---
**Author:** ![MirandaMora77](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@MirandaMora77](https://forums.unrealengine.com/u/MirandaMora77)\ **Post date:** [November 1, 2025, 7:46pm UTC](https://forums.unrealengine.com/t/editor-crashing-on-startup-after-38-00-update/2670810/10 "2025-11-01T19:46:20Z")
[UnrealEditorFortnite-backup-2025.11.01-17.43.05.log](https://forums.unrealengine.com/uploads/short-url/skvYEMaZtu2S6NzqOsyKpU9BAQc.log) (1.3 MB) ---
**Author:** ![AfterHours1](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/afterhours1/32/969648_2.png) [@AfterHours1](https://forums.unrealengine.com/u/AfterHours1)\ **Post date:** [November 1, 2025, 7:53pm UTC](https://forums.unrealengine.com/t/editor-crashing-on-startup-after-38-00-update/2670810/11 "2025-11-01T19:53:59Z")
[UnrealEditorFortnite-backup-2025.11.01-19.24.56.zip](https://forums.unrealengine.com/uploads/short-url/mXOKHUNhJ0wEKS8ZwnK618rQ40P.zip) (344.3 KB) ---
**Author:** ![Flak](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/flak/32/769441_2.png) [@Flak](https://forums.unrealengine.com/u/Flak)\ **Post date:** [November 1, 2025, 8:24pm UTC](https://forums.unrealengine.com/t/editor-crashing-on-startup-after-38-00-update/2670810/12 "2025-11-01T20:24:46Z")
Hey folks could you try this? - Navigate to the Fortnite client menu - Go to OPTION - Enable downloading High-Res textures - Click Apply ---
**Author:** ![NoHoldsBarred](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@NoHoldsBarred](https://forums.unrealengine.com/u/NoHoldsBarred)\ **Post date:** [November 1, 2025, 8:43pm UTC](https://forums.unrealengine.com/t/editor-crashing-on-startup-after-38-00-update/2670810/13 "2025-11-01T20:43:22Z")
That worked, thanks @Flak ! ---
**Author:** ![SupremeUEFN](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/supremeuefn/32/1203386_2.png) [@SupremeUEFN](https://forums.unrealengine.com/u/SupremeUEFN)\ **Post date:** [November 1, 2025, 8:47pm UTC](https://forums.unrealengine.com/t/editor-crashing-on-startup-after-38-00-update/2670810/14 "2025-11-01T20:47:58Z")
> [@MirandaMora77](#): > > 4276CB2D41D48DFD7AE477B6AAB71B67 That worked, Thanks Flak ---
**Author:** ![gamchanger451](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@gamchanger451](https://forums.unrealengine.com/u/gamchanger451)\ **Post date:** [November 2, 2025, 2:32am UTC](https://forums.unrealengine.com/t/editor-crashing-on-startup-after-38-00-update/2670810/15 "2025-11-02T02:32:31Z")
I can’t even get to the client menu ---
**Author:** ![Dudiing](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/dudiing/32/716892_2.png) [@Dudiing](https://forums.unrealengine.com/u/Dudiing)\ **Post date:** [November 2, 2025, 11:15am UTC](https://forums.unrealengine.com/t/editor-crashing-on-startup-after-38-00-update/2670810/16 "2025-11-02T11:15:33Z")
Worked for me, thanks! ---
**Author:** ![Bug-Reporter](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/bug-reporter/32/997076_2.png) [@Bug-Reporter](https://forums.unrealengine.com/u/Bug-Reporter)\ **Post date:** [February 11, 2026, 7:00pm UTC](https://forums.unrealengine.com/t/editor-crashing-on-startup-after-38-00-update/2670810/19 "2026-02-11T19:00:37Z")
FORT-1006651 has been ‘Closed’. We’re unable to reproduce this issue. ---
**Author:** ![system](https://d3kjluh73b9h9o.cloudfront.net/original/4X/7/1/3/713c9d3f58553f0de89543d76a8a3a2779dc9fa4.png) [@system](https://forums.unrealengine.com/u/system)\ **Post date:** [April 30, 2026, 6:40pm UTC](https://forums.unrealengine.com/t/editor-crashing-on-startup-after-38-00-update/2670810/20 "2026-04-30T18:40:02Z")
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