in the config.bat
jre\bin\java.exe -cp "lib\ext\*" com.tableausoftware.test.tools.TabjoltUI.TabjoltUI
What version of Tableau Server does this occur on?
I am facing the same issue as Max's ... In my case, I have installed Tabjolt 2018.2.0
Our Tableau server version is 2018.2.3.