Cryptsetup was never installed by default in Ubuntu; it was only installed if you selected encryption in the installer. however, you say this was an upgrade, and it also should not have been removed on upgrade. Please attach your upgrade logs from /var/log/apt/dist-upgrade.
Cryptsetup was never installed by default in Ubuntu; it was only installed if you selected encryption in the installer. however, you say this was an upgrade, and it also should not have been removed on upgrade. Please attach your upgrade logs from /var/log/ apt/dist- upgrade.