I found the problem. My login had a different default database than the master
database. When I changed my default database to master
, the error went away, and I was able to Watch Live Data on the extended event sessions.
To change the default database, in SSMS, I expanded the server, Security, Logins. I right-clicked on my user credentials. On the Login Properties page for my user, I changed "Default database" to master
. The error went away when I closed and reopened the connection in the SSMS Object Explorer.
EDIT 2018-12-11
On the feedback link for this issue, Karl Fasick posted a likely solution:
Object Explorer isn't connected to the master database... To fix - disconnect Object Explorer - Reconnect, but go to Connection Properties and explicitly choose master.