Invalid type definition: Cannot set properties of null (setting 'name')


I can to compile several of your samples but I have a problem with the "coap_client" sample (..\v2.3.0\nrf\samples\openthread\coap_client). When I compile it this is what I get:

I use the last version of nRF Connect SDK (v2.3.0) and I open the sample with nRF Connect for Desktop v4.0.1 - Toolchain Manager v1.2.4)

Can you tell me what I need to do to compile this example?

Thank you