code: def handle_transmission_error(self, learner_data, request_exception):
          
          try:
              sys_msg = request_exception.response.content
          except AttributeError:
              sys_msg = 'Not available'
          LOGGER.error(
              (
                  'Failed to send completion status call for enterprise enrollment %s'
                  'with payload %s'
                  '\nError message: %s'
                  '\nSystem message: %s'
              ),
              learner_data.enterprise_course_enrollment_id,
              learner_data,
              str(request_exception),
              sys_msg
          )
docs: Handle the case where the transmission fails.