hammer ping is failing with error "Error: Server broke connection"

Issue

Hammer command is failing in Satellite 6 with below error :

# hammer -u admin -p xxxxxxxxxxxxx -s https://$(hostname -f):443 ping
Could not load the API description from the server:
Server broke connection
  - is the server down?
  - was 'foreman-rake apipie:cache' run on the server when using apipie cache? (typical production settings)
Warning: An error occured while loading module hammer_cli_foreman.
Could not load the API description from the server:
Server broke connection
  - is the server down?
  - was 'foreman-rake apipie:cache' run on the server when using apipie cache? (typical production settings)
Warning: An error occured while loading module hammer_cli_foreman_ansible.
Could not load the API description from the server:
Server broke connection
  - is the server down?
  - was 'foreman-rake apipie:cache' run on the server when using apipie cache? (typical production settings)
Warning: An error occured while loading module hammer_cli_foreman_bootdisk.
Could not load the API description from the server:
Server broke connection
  - is the server down?
  - was 'foreman-rake apipie:cache' run on the server when using apipie cache? (typical production settings)
Warning: An error occured while loading module hammer_cli_foreman_openscap.
Could not load the API description from the server:
Server broke connection
  - is the server down?
  - was 'foreman-rake apipie:cache' run on the server when using apipie cache? (typical production settings)
Warning: An error occured while loading module hammer_cli_foreman_remote_execution.
Warning: An error occured while loading module hammer_cli_foreman_tasks.
Could not load the API description from the server:
Server broke connection
  - is the server down?