the event is Deprecated #289
Description
[20:58:33 WARN]: [WorldGuardExtraFlags] "WorldGuardExtraFlags v4.2.4-SNAPSHOT" has registered a listener for org.spigotmc.event.player.PlayerSpawnLocationEvent on method "public void net.goldtreeservers.worldguardextraflags.listeners.PlayerListener.onPlayerSpawnLocationEvent(org.spigotmc.event.player.PlayerSpawnLocationEvent)", but the event is Deprecated. "Listening to this event causes the player to be created early. Using the player from this event will result in undefined behavior. Prefer AsyncPlayerSpawnLocationEvent."; please notify the authors [isokissa3].