Hi friend, have you solved this problem?If not, you can have a look at here, I the paragon of material can be normal compilation, I deleted all the content of the Visual Studio on my computer (actually delete a incompatible components is ok, because I don’t know where to delete all deleted) and the version 4.19 upgrade, then you can compile the normal, you can have a look at this thread Believe it will be useful to you.How to fix ShaderCompiler not working in 4.19? - Rendering - Epic Developer Community Forums