Command ".partybot add" has been updated.
From now you must give the class a role as well.
ROLES: healer / meleedps / rangedps / tank
Examples:
.partybot add CLASS ROLE
.partybot add druid tank
.partybot add druid rangedps
.partybot add warrior meleedps
.partybot add shaman healer
.partybot add paladin meleedps
.partybot add priest rangedps
(You also can use PPC addon for easy access)