error csolution: no component was found with identifier 'ARM::Device:Definition'

Based on following repository,

https://github.com/Arm-Examples/AWS_MQTT_MutualAuth_Demo/tree/d72e26864e4259f3c0963cceb2afd4844362e188

I chaned the compiler as "GCC" and try to execute

csolution convert -s Demo.csolution.yml -c Demo.Debug+AVH

But, the error was returned as following:

error csolution: no component was found with identifier 'ARM::Device:Definition'
error csolution: processing context 'Demo.Debug+AVH' failed

What does it mean? 

Does it mean the target device ARM::SSE-300-MPS3 support only AC6?