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Assertion failed: MappedName.GetType() == NameMapType

Hi there, I get the following error when trying to start a dedicated server built for my game with Unreal Engine 5. The build goes through fine, but the server crashes when starting up. I can run the debugger to inspect stuff, but I have no idea what to look for. Any ideas?

I’m trying to use the current Unreal Engine 5 Early Access branch.

LogWindows: Error: Assertion failed: MappedName.GetType() == NameMapType [File:C:\Users\Test-Rend\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Public\Serialization/MappedName.h] [Line: 121]

EntireStartupLog.txt (59.8 KB)

It might be the object serialization error. Do you have any asset just copied from 4.26 content?
Try to export them and reimport the assset.