Building Matter light-switch-app CMake error

I'm trying to build the light-switch-app from Matter but I get following errors

I have already tried to reinstall the sdk (I use v2.8.0) and build it just like that without touching anything, but even then I get this. 

He says he cannot find certain files but they do exist and they are there, but what am I missing? 

Matter exists and he sees zephyr...

Can anyone help me with this?

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