After I have upgraded my Ubuntu virtual machine to the latest version, the error appeared:
"An error occurred while mounting /media/psf Press S to skip mounting or M for manual recovery"
Some of Parallels Tools components (Shared Folders) are broken.
- Open Terminal window via shortcut Ctrl+Alt(Option)+T.
Execute the following commands one-by-one:
cd /media/Parallels\ Tools/ sudo ./install --install sudo shutdown -r