How to compile lightmass?

[Danjio]

@Kontur;728504

Do you build the engine from source? If so, you have to recompile the Lightmass module (as the error suggests).

EDIT:
Open the engine solution in Visual Studio and search for UnrealLightmass, then right click: build.

It doesn’t show up when i search for it. I already verified the engine. I got it from the launcher. It did work yesterday and now it doesnt :l

EDIT: A mesh was causing the problem. Reimplementing it helped out