Hello @KevinHibma - I was able to resolve this:
Restart arcgis server exe processes - no effect
Restart both windows servers - no effect
Uninstall patch - no effect
Reinstall patch - no effect
Then I decided to check the configuration of the webhook processes json in the
....\config-store\system\webhookprocessors-config directory where I saw that this file uses a url connection to the datastore
"jdbcUrl":"jdbc:postgresql://DATASTOREMACHINE.BCC.SCGOV.LOCAL:9876/webhooks"
I checked that my port 9876 was open and unrestricted vis system resources and it is.
Regardless, I went ahead and with a restart of the:
ArcGIS Data Store service - log entries stopped. No more errors.
So basically a restart of the datastore service resolved some type of communication issue that may or may not have been coincidental with an ArcGIS Server service restart for any reason, not just application of this patch.
So I consider this resolved on my end at least for now.
@JonEmch