From the changelog
In initial versions of HestiaCP, we used Jailkit to enabled Jailed SSH. It had major disadvantages, so we have decided it to replace it with bubblewrap. Users running Jailed SSH in the past are advised to run the migration script! It can be found in /usr/local/hestia/install/upgrade/manual/migrate_jailkit_to_bubblewrap.sh
. See #4698
I dont recall there being an option to install jailkit so is there a way to check if it is installed and in use?