[Satellite6] pulp-api failed in Red Hat Satellite Capsule, pulpcore-api.service: Main process exited, code=exited, status=1/FAILURE

Issue

• Capsule's pulp-api failed:

Displaying the following service(s):
redis, postgresql, pulpcore-api, pulpcore-content, pulpcore-worker@1.service, pulpcore-worker@2.service, pulpcore-worker@3.service, pulpcore-worker@4.service, httpd, puppetserver, foreman-proxy
:
/ All services displayed                                              [31m[1m[FAIL][0m
Some services are not running (pulpcore-api)

• pulp-api shows:

May 23 15:31:03 capsule615 pulpcore-api[7391]: Error: This app must be executed using pulpcore-api entrypoint.
May 23 15:31:03 capsule615 systemd[1]: pulpcore-api.service: Main process exited, code=exited, status=1/FAILURE
May 23 15:31:03 capsule615 systemd[1]: pulpcore-api.service: Failed with result 'exit-code'.
May 23 15:31:03 capsule615 systemd[1]: Failed to start Pulp API Server.