This will reduce the apparmor errors, but you will still receive errors if cups calls pam for an authentication method other than /etc/shadow.
The real problem seems to be that a new administrator isn't added to the lpadmin group. see bug 152107.
There is no option related to printer administration in the users-admin tool, and you would need to read cups.conf to find out you need to add the user manually to lpadmin.
This will reduce the apparmor errors, but you will still receive errors if cups calls pam for an authentication method other than /etc/shadow.
The real problem seems to be that a new administrator isn't added to the lpadmin group. see bug 152107.
There is no option related to printer administration in the users-admin tool, and you would need to read cups.conf to find out you need to add the user manually to lpadmin.