I have freshly installed foreman with Katello successfully. But when I am trying to open foreman web portal its given me the below error.

Oops, we're sorry but something went wrong Katello::Errors::CandlepinNotRunning

1. hammer -p example status
   Version: 3.5.1
   API Version: v2
   Database:
   Status: ok
   Server Response: Duration: 0ms
   Plugins:
   1) Name: foreman-tasks
   Version: 7.1.1
   2) Name: foreman_column_view
   Version: 0.4.0
   3) Name: foreman_default_hostgroup
   Version: 7.0.0
   4) Name: foreman_discovery
   Version: 22.0.2
   5) Name: foreman_remote_execution
   Version: 8.2.0
   6) Name: katello
   Version: 4.7.1
   Smart Proxies:
   1) Name: sjprdsatapp01.example.com
   Version: 3.5.1
   Status: ok
   Features:
   1) Name: pulpcore
   Version: 3.2.0
   2) Name: logs
   Version: 3.5.1
   Compute Resources:

candlepin:
Status: FAIL
Server Response: Message: 404 Not Found
candlepin_auth:
Status: FAIL
Server Response: Message: Katello::Errors::CandlepinNotRunning
candlepin_events:
Status: FAIL
message: Not running
Server Response: Duration: 0ms
katello_events:
Status: ok
message: 0 Processed, 0 Failed
Server Response: Duration: 0ms
pulp3:
Status: ok
Server Response: Duration: 455ms
pulp3_content:
Status: ok
Server Response: Duration: 62ms
foreman_tasks:
Status: ok
Server Response: Duration: 3ms

==========================================

1. foreman-maintain health check
   Running ForemanMaintain::Scenario::FilteredScenario ================================================================================
   Check number of fact names in database: ^C [RUNNING]
   --------------------------------------------------------------------------------
   [root@sjprdsatapp01 ~]# foreman-maintain health check
   Running ForemanMaintain::Scenario::FilteredScenario ================================================================================
   Check number of fact names in database: [OK]
   --------------------------------------------------------------------------------
   Check whether all services are running: [OK]
   --------------------------------------------------------------------------------
   Check whether all services are running using the ping call: [FAIL]
   Couldn't connect to the server: SSL_connect returned=1 errno=0 state=error: certificate verify failed (self signed certificate in certificate chain)
   --------------------------------------------------------------------------------
   Continue with step [Restart applicable services]?, [y(yes), n(no)]

====================================================================

1. katello-certs-check -c /root/foreman_cert/satellite_example_com_cert.pem -k /root/foreman_cert/foreman_cert_key.pem -b /root/foreman_cert/ca_cert_bundle.pem
   Checking server certificate encoding:
   [OK]

Checking expiration of certificate:
[OK]

Checking expiration of CA bundle:
[OK]

Checking if server certificate has CA:TRUE flag
[OK]

Checking for private key passphrase:
[OK]

Checking to see if the private key matches the certificate:
[OK]

Checking CA bundle against the certificate file:
[OK]

Checking CA bundle size: 3
[OK]

Checking Subject Alt Name on certificate
[OK]

Checking if any Subject Alt Name on certificate matches the Subject CN
[OK]

Checking Key Usage extension on certificate for Key Encipherment
[OK]

Checking for use of shortname as CN
[OK]

Validation succeeded

=========================================================

1. hammer ping
   database:
   Status: ok
   Server Response: Duration: 0ms
   candlepin:
   Status: FAIL
   Server Response: Message: 404 Not Found
   candlepin_auth:
   Status: FAIL
   Server Response: Message: Katello::Errors::CandlepinNotRunning
   candlepin_events:
   Status: FAIL
   message: Not running
   Server Response: Duration: 0ms
   katello_events:
   Status: ok
   message: 0 Processed, 0 Failed
   Server Response: Duration: 0ms
   pulp3:
   Status: ok
   Server Response: Duration: 460ms
   pulp3_content:
   Status: ok
   Server Response: Duration: 62ms
   foreman_tasks:
   Status: ok
   Server Response: Duration: 3ms

Our Setup is with External Database.