Server side build causes an error.

[omer253]

Hi,
I did a server side build of my project, and I receive the following error:
title: Serialization Error : Action Needed, text: Corrupt data found, please verify your installation.

Assertion failed: CurrentPos + Count <= TotalSizeOrMaxInt64IfNotReady() [File:E:\UnrealEngine\Engine\Source\Runtime\CoreUObject\Private\Serialization\AsyncLoading.cpp] [Line: 7791]
Seeked past end of file /Engine/EngineResources/WhiteSquareTexture (129647 / 3851)

Engine: UE5.03
Engine built from source.
Platform: Win64
Any Idea what is causing this?
Thanks

[ZenLeviathan]

Hey @omer253, Welcome to the forums!
Have you run into this thread yet on your search?

Launcher Crashing on startup - Serialization Error : Action Needed

So I found out the answer was simple. Turns out if you ever installed Unreal and you later have your environment Temp & TMP paths changed at all(probably to free up space on your C:), then the launcher will fail. You can test this by making another user, and if the launcher works on that account and not yours then you can be sure it the environment variable. Just go to your system settings and set them both back to: %USERPROFILE%\AppData\Local\Temp After a restart that should fix the problem.

I hope this can lead you in the right direction!
-Zen

[omer253]

Hi Zen, thank you for the answer.
Unfortunately, it is not the same error. My error occurs after building a development server of a game developed in UE5.03.
When trying to open the compiled development server, the error appears. It happens in an additional computer as well.

[ZenLeviathan]

@omer253
It seems like it’s failing due to some missing files. You may need to manually update/hotfix that file since you’re building from the source.
Let me know if it’s still an issue!
-Zen

[ChuckBoBuck22]

I have the same issue. I’ve tried different engine branches- 5.0-main, release- and still get the error. The debugger hits an exception in asyncloading.cpp, line 8444. It seems to want to read beyond end of file for /Engine/EngineMaterials/WorldGridMaterial.

When I first got the error (prior to pulling latest from UE and checking out different branches) the error was the same, but the material throwing it was WhiteSquare. I’m thinking it’s not the material, but something else given it’s occuring on more than one material.

[ZenLeviathan]

Hey @ChuckBoBuck22
It seems like there is a material compilation bug happening. Depending on what OS you have, I’d recommend this fix:

=== Critical error: === Failed to compile default material /Engine/EngineMaterials/WorldGridMaterial.WorldGridMaterial!

Please go to your project properties, Platforms → Linux and disable GL3 there. For whatever reason there’s an issue compiling default material in your engine installation for GL3. This RHI has been long deprecated anyway, so by not supporting it you will only save yourself more trouble. (The compilation of the default material shouldn’t fail nevertheless).

There might be more at play though, with GPU issues.
I hope this can help, let me know if you have any more questions!
-Zen

[ChuckBoBuck22]

For my case, it was just me being stupid. I didn’t package the server. I built the binaries for client and server, but only packaged the client.

[ZenLeviathan]

@ChuckBoBuck22
I’m glad you figured it out though, and thanks for replying!
Happy Developing!
-Zen