Could you ever resolve this?
I need the Viveport SDK for 4.24. No matter which version (documentation says last supported version on 4.24 is Viveport SDK 1.7.18), I can't compile any.
I have the same errors ("Expected x to be first header included"). Also many of the referenced paths in the build.cs seem to be off/wrong.
Did you ever get any help or solution?