Error and Null Nodes in Metrics Panel for CA Chorus for Security and Compliance Management

Symptom:

For CA Chorus for Security and Compliance Management, you may experience the following issues:

I am seeing a null node in the Metrics panel resource list and in the Investigator trees. If I select the null node or its children nodes, an error appears.
When I try to select a Security resource in the Metrics panel, the Security drop-down list is empty and an error appears.

Solution:

The Time Series Facility (TSF) Server was down during or after the CA Chorus Application Server startup.

Follow these steps:

Verify that the TSF Server (CHORNTSF) is started. If it is stopped, restart it.
If restarting the TSF Server did not resolve the issue, recycle the CA Chorus Application Server.
If the problem persists, contact CA Support.