    # File lib/chef/formatters/error_inspectors/node_load_error_inspector.rb, line 42
            def add_explanation(error_description)
              case exception
              when Net::HTTPServerException, Net::HTTPFatalError
                humanize_http_exception(error_description)
              when *NETWORK_ERROR_CLASSES
                describe_network_errors(error_description)
              when Chef::Exceptions::PrivateKeyMissing
                error_description.section("Private Key Not Found:","Your private key could not be loaded. If the key file exists, ensure that it is\nreadable by chef-client.\n")
                error_description.section("Relevant Config Settings:","client_key        \"\#{api_key}\"\n")
              else
                error_description.section("Unexpected Error:","#{exception.class.name}: #{exception.message}")
              end
            end