You should edit manually C:\Users\“youruser”\openmrs\sdk.properties file and change dockerHost=http://127.0.0.1:2375/ to dockerHost=tcp://localhost:2375
Please consider putting this info in the guide for helping other newcomers as me.
Yes, especially if there are errors! Although, in this case, rather than changing the guide, the right thing to do would be to open a ticket to fix the SDK so you don’t have to futz around with the SDK’s properties (since we can just fix the SDK to default to tcp instead of http).
I agree that would be great to be fixed on maven plugin directly. But I notified the situation to avoid newcomers to be blocked by this. The quick way would be to be warned at least in the guide.