[03:15:21] [Server thread/ERROR]: Unhandled exception executing command 'fly' in plugin FactionsFly v1.8.7
org.bukkit.command.CommandException: Unhandled exception executing command 'fly' in plugin FactionsFly v1.8.7
	at org.bukkit.command.PluginCommand.execute(PluginCommand.java:46) ~[spigot.jar:git-Spigot-21fe707-e1ebe52]
	at com.earth2me.essentials.Essentials.onCommandEssentials(Essentials.java:443) [EssentialsX.jar:?]
	at com.earth2me.essentials.Essentials.onCommand(Essentials.java:432) [EssentialsX.jar:?]
	at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44) [spigot.jar:git-Spigot-21fe707-e1ebe52]
	at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:141) [spigot.jar:git-Spigot-21fe707-e1ebe52]
	at org.bukkit.craftbukkit.v1_8_R3.CraftServer.dispatchCommand(CraftServer.java:641) [spigot.jar:git-Spigot-21fe707-e1ebe52]
	at org.bukkit.craftbukkit.v1_8_R3.CraftServer.dispatchServerCommand(CraftServer.java:627) [spigot.jar:git-Spigot-21fe707-e1ebe52]
	at net.minecraft.server.v1_8_R3.DedicatedServer.aO(DedicatedServer.java:412) [spigot.jar:git-Spigot-21fe707-e1ebe52]
	at net.minecraft.server.v1_8_R3.DedicatedServer.B(DedicatedServer.java:375) [spigot.jar:git-Spigot-21fe707-e1ebe52]
	at net.minecraft.server.v1_8_R3.MinecraftServer.A(MinecraftServer.java:654) [spigot.jar:git-Spigot-21fe707-e1ebe52]
	at net.minecraft.server.v1_8_R3.MinecraftServer.run(MinecraftServer.java:557) [spigot.jar:git-Spigot-21fe707-e1ebe52]
	at java.lang.Thread.run(Thread.java:745) [?:1.8.0_101]
Caused by: java.lang.ClassCastException: org.bukkit.craftbukkit.v1_8_R3.command.ColouredConsoleSender cannot be cast to org.bukkit.entity.Player
	at me.sacchur.mcore.factionsfly.commands.fly.onCommand(fly.java:21) ~[FactionsFly(v1.8.7%20for%20MCore).jar:?]
	at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44) ~[spigot.jar:git-Spigot-21fe707-e1ebe52]
	... 11 more