ERROR couldn't save state for user <>: user <> doesn't exist

[pjgoodall]

Describe the bug
I tried save system state using documented command, error results

To Reproduce

% whoami                          
peterg

% zsysctl state save -vv
DEBUG /zsys.Zsys/SaveUserState() call logged as [efa327c7:194e653b] 
DEBUG Check if grpc request peer is authorized     
DEBUG Polkit call result, authorized: true         
INFO Requesting to save state for user "peterg"   
DEBUG ZFS: ending transaction                      
DEBUG ZFS: transaction done                        
ERROR couldn't save state for user "peterg": user "peterg" doesn't exist 

Expected behavior
system state should be saved as described in https://manpages.ubuntu.com/manpages/focal/man1/zsysctl-save.1.html

For ubuntu users, please run and copy the following:

1. ubuntu-bug zsys --save=/tmp/report
2. Copy paste below /tmp/report content:

report.txt

Screenshots
If applicable, add screenshots to help explain your problem.

Installed versions:

• OS: (/etc/os-release)

% cat /etc/os-release
NAME="Ubuntu"
VERSION="20.04.2 LTS (Focal Fossa)"
ID=ubuntu
ID_LIKE=debian
PRETTY_NAME="Ubuntu 20.04.2 LTS"
VERSION_ID="20.04"
HOME_URL="https://www.ubuntu.com/"
SUPPORT_URL="https://help.ubuntu.com/"
BUG_REPORT_URL="https://bugs.launchpad.net/ubuntu/"
PRIVACY_POLICY_URL="https://www.ubuntu.com/legal/terms-and-policies/privacy-policy"
VERSION_CODENAME=focal
UBUNTU_CODENAME=focal

• Zsysd running version: (zsysctl version output)

% zsysctl version
zsysctl	0.4.8
zsysd	0.4.8

Additional context

#210
#204
#208

[vortigont]

maybe too old, but for whoever hits this again the solution was
check the value of zfs get com.ubuntu.zsys:bootfs-datasets rpool/USERDATA/<user>_xxxxx
it may be empty or contain some invalid value.
Fix it with setting proper system root dataset for the user. i.e.
zfs set com.ubuntu.zsys:bootfs-datasets=rpool/ROOT/ubuntu_xyzxyz rpool/USERDATA/youruser_x42x42

[TheGrave]

maybe too old, but for whoever hits this again the solution was check the value of zfs get com.ubuntu.zsys:bootfs-datasets rpool/USERDATA/<user>_xxxxx it may be empty or contain some invalid value. Fix it with setting proper system root dataset for the user. i.e. zfs set com.ubuntu.zsys:bootfs-datasets=rpool/ROOT/ubuntu_xyzxyz rpool/USERDATA/youruser_x42x42

Tried this but it doesn't work. Had to re-install zsys instead.