It happens often with me also. Usually what I used to do in such cases
- Refresh (F5) the browser page and try
- Logout and SignIn again.
It works for me. I have observed this happens when we kept the browser idle for few minutes.
Let us know if this works for you.
I keeps refreshing, it does not work immediately, it could work after waiting, so all I have to do is waiting.
I have submitted a case on Support, but there is no reply. Tableau Community is very important as well as Tableau product, users need to exchange discussion and ask for help on Community , it is important too, but seems like Tableau team does not pay much attention to Community, it is sad.
Its not like that we need to understand the impact of network traffic on this site. Thousands of users used to hit at a time on this site so sometimes it respond with lag. Though whenever any patch update or down time schedule happens in forum they used to issue a circular at home screen of this site. I have seen few instances like that. As you've already raise a ticket then wait for their reply. Let see what they suggest