Splunk error: Warning web interface does not seem to be available

[BJF]

New install of Splunk 9.3  on RedHat Ent 7.9 

Initial installly successful.    Changed indexer to peer indexer & restarted splunk -

splunk service loads successfully until:  " Waiting for web interface at https /127.0.0.1:8000 to be available...."

Systemd fails with  - Warning: web interface does not seem to be available!

splunk.service:   control process exited, code=exited status=1 

Failed to start SYSV: Splunk indexer service

Unit splunk.service entered failed state.

Have searched for solution to no avail...    Firewall is disabled.  

[isoutamo]

Hi
What you found from /opt/splunk/var/log/splunk/splunkd.log?
There should be a reason for exit.
R. Ismo