Updated handling 6.18.5+ (not released, dev builds only currently)

Online mode can be set within VotingPlugin via this setting:

OnlineMode: true

If your using mixed uuids (online/offline or premium/cracked) then it may work better to disable OfflineMode. VotingPlugin will simply get the uuid based on the player name, essentially ensuring uuids will always be the same.

6.18.4 and below:

Online mode can be set within VotingPlugin via this setting:

OnlineMode: true

Only disable this setting if you know for a fact your using offline uuids exclusively.

In the event of using mixed uuids (Premium and cracked players) leave enabled and disable UUIDLookup on proxy

If you are unsure of this setting, leave it enabled.