After the upgrade (and reboot), the designer is no longer functional.
There are two manifestations of this error:
-
The designer is trying to open, then ends up with this message (not really descriptive):
-
The designer does not even open (only XAML is shown).
I have tried to reproduce this with a plan WPF application and everything works fine.
However, when I tried with plain application from DevExpress template (blank MVVM), I could not get the designer to work.
Please let me know if I can provide more data.