Unreal Engine fatal error on opening. Builds in wrong drive.

Hi all,

There is a fatal error occurring when trying to open a project on a cloud-stored location that’s mounted as a drive. The following error keeps being output:

Fatal error: [File:D:\build++UE5\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerLoad.cpp] [Line: 4470] Material /Game/StarterContent/Materials/M_Basic_Floor.M_Basic_Floor: Serial size mismatch: Got 0, Expected 609

This issue occurs with all assets and its not just this single one having the issue.

The issue that I’m currently at is that the project storage location is on G:, the install location of Unreal is on C: but for some reason, it’s building in D:. Can only shine a light on what’s causing this and potential solutions?



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Thanks for any advice