Same here. I got a black qt window with button MessageBox_Continue and that was it. I could not even see the dark-grey text. Enabling *.debug=true for QT didn't tell anything interesting either.
should be fixed in the current steamvr beta
Nothing extracted yet.
Your system information
Please describe your issue in as much detail as possible:
If a system tray application isn't running, SteamVR gives an untranslated message that doesn't makes it obvious what the problem is. The error should explain that a systray is needed.
Steps for reproducing this issue: