de-bugging AWS SAM deployment failures

I'm attempting to deploy this example stack from Containers on AWS. I've copied the templates from the example just as they are, but the deployment fails at the point where it tries to deploy the resources defined in the service.yml template. At the failure, the shell output indicates the resource within that template file that failed to be created. But the shell does not give any additional output that might help me find the cause of the failure.

Where or how can I get more detailed logs or output of the build process that would enable me to diagnose the problem?

Thanks