Red Hat Insights upload fails with a error message 'Upload archive failed with status code 413'

Issue

• insights-client registration fails with error message Upload archive failed with status code 413.

  # insights-client --register
  Successfully registered host client.example.com
  Automatic scheduling for Insights has been enabled.
  WARNING: Excluding data from files
  Starting to collect Insights data for client.example.com
  Uploading Insights data.
  Upload archive failed with status code  413
  Upload attempt 1 of 1 failed! Status Code: 413
  All attempts to upload have failed!
  Please see /var/log/insights-client/insights-client.log for additional information