Compile error in light_switch_client_nrf52840

[janjune]

The following error occurs during compilation:

How do I deal with it?

[Joakim Jakobsen]

Hi. 

It seems to me that your nRF5 SDK for Mesh can't locate the nRF5 SDK files that is required. 

Like I suggested here: 
https://devzone.nordicsemi.com/f/nordic-q-a/50081/how-can-i-run-the-nrf52840-bluetooth-mesh-example 

Please make sure that you edited the Global macros to contain SDK_ROOT=<the path to nRF5 SDK v15.2.0 instance>

Best regards, 
Joakim