Mount Virtual drive fails, unlock fine but "workrounds" do not survive log off

New win11 laptop, cryptomator 1.19.1 worked fine until recently. Now fails to mount virtual drive with “resource not available…”. One other post suggested fix which does not work for me, Summary of failures to fix :-
setting " run with not admin priv"
trying all mount point options.
using WinFps 2022 or 2023 versions
locating encrypted folder on any cloud, onedrive,google drive, dropbox,mega

temporary fix . i.e. works until account logoff:-
C:\ProgramData\Microsoft\Windows\Start Menu\Programs\Cryptomator - set the shortcut to win8 compatibility mode and save settings

This renders Cryptomator awkward to use. Any further suggestions to fix permanently?