I am using trial versions of Tableau Desktop and Software. Server is running under Network Service and AD is not enabled. When I first installed the server and the desktop, I was able to publish workbooks to the server using the Administrator account I created as part of the install. Now, a couple of days later, I have started getting an "invalid username/password error" when I try to log on to the Tableau server. I've seen several threads on the forum with this issue but without any conclusive answers. Any idea on what might be going on and how it stopped working without any changes in the settings?