My TB just autoupdates to v 91 (on release channel). And after the restart all panes were totally empty including Navigation Pane, Message Pane etc. What I also experienced ist that there is another update in the pipeline 91.2.1 which wants another restart. But after the restart the update is still not installed. Just googled my problem and it seems that 2 other users have that as well but not for that version. And they solved it with a complete uninstall/reinstall. I am hoping that i will miss this out and recover in another way. Have you got any ideas?