I am trying to restart my VM after following the instructions (http://kb.parallels.com/en/112609) to manually install parallels tools. The reason I needed to do this is I've lost keyboard access to Modern Apps and this was one of the suggestions.
I tried one of the suggestions above to reset ownership/permissions:-
$ sudo chmod -R 777 "/Users/Shared/Parallels/Windows 10 Pro.pvm"
$ sudo chown -R {username}:staff "/Users/Shared/Parallels/Windows 10 Pro.pvm"
$ sudo chflags -R nouchg "/Users/Shared/Parallels/Windows 10 Pro.pvm"
$ sudo chflags -R noschg "/Users/Shared/Parallels/Windows 10 Pro.pvm"
but that hasn't worked.
A technical report with the ID number 236352930 has been sent to Parallels.