ErrorMessages: Reported-offline message is now displayed when trying to report a vanished player (on the same Spigot server) with the Config: ReportOnline setting enabled in config.yml file (thanks to piotrskibapl for the suggestion on GitHub). The tab suggestions when using /report command takes also in consideration vanished players on the same server, but not between servers because of the Bukkit API limitations (there is no official check to know if a player is vanished on a network, it depends on the vanish plugin used).