Thanks very much for the message. I can confirm both the server and client are 9.2, I was not sure why the error happening ?
Please republish the workbooks which is having issue.
Tried many times but the error unchanged.
1. what is the data source of said published workbook?
2. Has it ever worked and stopped working?
3. Are other working workbooks using the same data source?
4. Are other users experiencing the same error also?
It might be useful to open up a support case for Tableau Technical team to dig further into it.
This usually occurs when Tableau Server's Postgre SQL server is overloaded or full.
I have faced the same issue previously and I tried this:
It worked for me.
Hope this works for you too.