Just a wild guess, but does your i3 setup have Polkit setup fully like it would be in KDE? The “the name is not activatable” is a string typically stemming from DBus. Especially for potential cross-user services that may require various permission sets, polkit is often utilized to bridge what is necessary. If you don’t have an authentication agent setup for your i3 desktop, you should probably set one up, even if it is something basic like xfce’s or lxqt’s.
Moshpirit