UnrealFrontend Error Building WindowsServer

I’m trying to build the server files using UnrealFrontend (I don’t know of another way to build server and client files).
I’m getting errors on plugins, but the problem is not within the plugins themselves, I think it’s a permission issue that is not making them find specific files which are generated files, and some of the files are ‘InputCoreTypes.generated.h’, ‘NetSerialization.generated.h’ and ‘BlueprintAsyncActionBase.generated.h’.

Any help is appreciated!

Problem solved. I was stupid enough to use UE4’s launcher UnrealFrontend instead of using the engine source’s UnrealFronted…