Bukkit

On occasion, voting triggers the message "<name> just voted for Unknown Server on <server>". When this happens, the player receives no rewards as if they didn't vote. Is anyone aware of a fix for this issue?

what version are you using? this plugin hasn't been updated for 1.13 or 1.14, yes it still works in 1.13 but it causes major lag when someone votes, 1.14 i havent even bothered with since its such a state of an update so i wont test it there. no im not the dev but i do use the plugin.