The polkit definition of the admin group is in /etc/polkit-1/localauthority.conf.d/51-ubuntu-admin.conf
Did you update that file to reflect that your admin group has a different naming?
The polkit definition of the admin group is in 1/localauthorit y.conf. d/51-ubuntu- admin.conf
/etc/polkit-
Did you update that file to reflect that your admin group has a different naming?