I have seen this but have been unable to figure out why. In my Win 11 22H2 Windows PE environment UI++ will not launch while working from my Hyper-V VM. If I use the same package/config in my Win 11 21H2 Windows PE environment it works fine. Also I have had reports that UI++ still works while on a physical device in the Win11 22H2 PE environment just not Hyper-V. Again not sure why it works on 21H2 but not 22H2. Hopefully someone else is able to assist further.