What version of Tableau Server are you using and what is the data source that is the connection is being embedded? I can do some additional research with some more information.
Our organization is running tableau server 10.5.3.
We should be upgrading soon to the latest version, but this is were we stand now.
The data sources that I am connected to, and ultimatly the server attemet to extract from, are only MS SQL.
I very much appriciated your help, pacient and time