Hit “print screen” on your keyboard (usually in the upper right hand corner) and then paste it into some sort of photo editing propgram (for instance paint in windows). Save it and upload it to your server and link it here 🙂
I’ve got the same problem here too. Upgraded using the Auto-upgrade plugin from I believe 2.6.3. The site seems to work OK but the admin panel is not what it was. I’ve done all the obvious, clear cookies, refresh page, etc., but no help.