Package import - Unknown custom version and cannot be loaded for the AssetRegistry

Development Pipeline & Plugins
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1

When adding certain packages from the Marketplace to my project, I always get the error “unknown custom version and cannot be loaded for the AssetRegistry” for some of the .uassets.
In this specific case UltraDynamicSky.

E.g. dozens of errors like this:

T:/repo/Content/UltraDynamicSky/Particles/UDW_Wind_Force.uasset uses an unknown custom version and cannot be loaded for the AssetRegistry

But when I add UltraDynamicSky to an empty project it loads just fine.

Does anyone know how to resolve this issue? Anyone understand what is going on?

2

Never mind about this. I found the solution.

We have a stripped down C++ project and some dependent plugins were missing (Editor Scripting & Niagara). After enabling them, the packages load fine.