Update from 9.1.1 to 9.2.1

[ErreGi]

Good morning,
I did the Splunk Enterprise update from version 9.1.1 to 9.2.1 but the web interface no longer shows the connected machines.
What can I verify?
Thanks
OS Centos 7

[PickleRick]

Your question is a bit vague but I'll assume you mean that you don't see your forwarders in Forwarder Management section of the UI (either on your Deployment Server or an all-in-one instance).

See this document:

https://docs.splunk.com/Documentation/Splunk/9.2.1/Updating/Upgradepre-9.2deploymentservers