class Aws::Errors::MissingEndpointHostLabelValue

with ‘hostPrefix’ requirement
at operation input when endpoint trait is available
raised when hostLabel member is not provided

def initialize(name) 

def initialize(name)
  msg = "Missing required parameter #{name} to construct"\
        ' endpoint host prefix. You can disable host prefix by'\
        ' setting :disable_host_prefix_injection to `true`.'
  super(msg)
end