Un5 is crashing on start a project.

Development Getting Started & Setup
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1

Hey y’all,

My project keep crashing on start. What I did was I clicked to package the project. Then, I tried to open the console log. UN crashed that time. Since then I cant open the project.

Error log shows this:

Script Stack (0 frames) :

[2024.02.18-08.08.37:872][ 0]LogWindows: Error: appError called: Assertion failed: !HasAnyFlags(RF_NeedPostLoad) [File:D:\build++UE5\Sync\Engine\Source\Runtime\Engine\Private\Materials\MaterialInstance.cpp] [Line: 2444]

[2024.02.18-08.08.37:872][ 0]LogWindows: Windows GetLastError: The operation completed successfully. (0)

Error_01
Error_01632×680 22.4 KB

2

Greetings @DeanFromTokyo

Are you using Nanite with this? Also, the first thing I’d try is enabling SM5 and changing to DirectX 11 and then try to reopen the map/project. Let me know if it allows it to open. If it does and you are using Nanite, try turning off Nanite after you get it launched and then change back to CM6 and Dx12.