A little more information would be needed to help identify the issue here.
When did the problem start or has it always been present?
any tabadmin command get you the error or any in particular?
What version of Tableau server are you running?
Do you start tabadmin/ cmd prompt as an admin?
what is the exact error message if any? screenshot?
Its always there in our POC set up. any tabadmin command i use i get this error. version 10. yes i started as an admin.
*** The driver encountered an unknown error: org.postgresql
: Connection to localhost:8060 refused. Check that the hostna
rect and that the postmaster is accepting TCP/IP connections."
We had the same sort of issue with a Tableau install at a client's site recently. Uninstall / Reinstall corrected it.