[11:46:26 INFO]: [PerWorldServer] Enabling PerWorldServer v3.5
[11:46:26 INFO]: [PerWorldServer] Found version v1_12_R1 of CraftBukkit.
[11:46:26 ERROR]: [PerWorldServer] Plugin PerWorldServer v3.5 has failed to register events for class uk.nstr.perwo
rldserver.listeners.WorldSwitchListener because org/bukkit/event/server/ServerLoadEvent does not exist.
[11:46:26 INFO]: [PerWorldServer] Your version of PerWorldServer is up-to-date!