The problem is the permissions on the .desktop file do not include execute permissions. A quick and easy solution for you would be to run "sudo chmod a+x /usr/share/ecryptfs-utils/ecryptfs-mount-private.desktop". When the .deb is downloaded and extracted, the file in usr/share/ecryptfs-utils/ecryptfs-mount-private.desktop has no execute permissions for any users, where it should have execute permissions for all users.
The problem is the permissions on the .desktop file do not include execute permissions. A quick and easy solution for you would be to run "sudo chmod a+x /usr/share/ ecryptfs- utils/ecryptfs- mount-private. desktop" . When the .deb is downloaded and extracted, the file in usr/share/ ecryptfs- utils/ecryptfs- mount-private. desktop has no execute permissions for any users, where it should have execute permissions for all users.