Getting error message "Unable to find registration template for host xx running RedHat x.x, associate the registration template for this OS first" with the Global Registration Template on the content host.

Issue

• Getting error message Unable to find registration template for host xx running RedHat x.x, associate the registration template for this OS first with the Global Registration Template on the content host.
  e.g.

# curl  -X GET "https://xxxxxxx.com:9090/register?activation_key=rhosp-key&location_id=2&operatingsystem_id=3&organization_id=1&setup_insights=false&setup_remote_execution=false" -H 'Authorization: Bearer eyJhbMmJhMTAyNTJmYjBlNmVlMjMwMDIwMjlmMjUiLCJleHAiOjE2MzQ2NDg5ODZ9.VrdR8G4niX1U99KmeOIWn5eVzvpHnepHcbSM_aKmvRE' | bash
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100 10363  100 10363    0     0  59901      0 --:--:-- --:--:-- --:--:-- 60250
#
# Running registration
#
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100  8500  100  8500    0     0  1660k      0 --:--:-- --:--:-- --:--:-- 1660k
Updating Subscription Management repositories.
Unable to read consumer identity

This system is not registered to Red Hat Subscription Management. You can use subscription-manager to register.

Dependencies resolved.
=========================================================================================================
 Package                                    Architecture    Version          Repository             Size
=========================================================================================================
Installing:
 katello-ca-consumer-xxxxxxx.com          noarch          1.0-1            @commandline          8.3 k

Transaction Summary
=========================================================================================================
Install  1 Package

Total size: 8.3 k
Installed size: 20 k
Downloading Packages:
Running transaction check
Transaction check succeeded.
Running transaction test
Transaction test succeeded.
Running transaction
  Preparing        :                                                                                 1/1
  Installing       : katello-ca-consumer-xxxxxxx.com-1.0-1.noarch                                  1/1
  Running scriptlet: katello-ca-consumer-xxxxxxx.com-1.0-1.noarch                                  1/1
  Verifying        : katello-ca-consumer-xxxxxxx.com-1.0-1.noarch                                  1/1
Installed products updated.

Installed:
  katello-ca-consumer-xxxxxxx.com-1.0-1.noarch

Complete!
The system has been registered with ID: 324-f0ed-43f-b23f-8d67
The registered system name is: rhel8u4
Installed Product Current Status:
Product Name: Red Hat Enterprise Linux for x86_64
Status:       Subscribed

  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100   303  100   168  100   135    724    581 --:--:-- --:--:-- --:--:--  1306
ERROR: not_found
Unable to find registration template for host rhel8u4 running RedHat 8.4, associate the registration template for this OS first