Turbo Mode Error

I'm trying to enable the turbo mode but I get this error:
//edit Turbomode works ingame but not from console!
This error appears
>ewg pre-generate turbo
[19:03:13 WARN]: Unexpected exception while parsing console command "ewg pre-generate turbo"
org.bukkit.command.CommandException: Unhandled exception executing command 'ewg' in plugin EpicWorldGenerator v8.0.0
        at org.bukkit.command.PluginCommand.execute(PluginCommand.java:46) ~[spigot.jar:git-Spigot-f6a273b-a639ae4]
        at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:141) ~[spigot.jar:git-Spigot-f6a273b-a639ae4]
        at org.bukkit.craftbukkit.v1_13_R2.CraftServer.dispatchCommand(CraftServer.java:699) ~[spigot.jar:git-Spigot-f6a273b-a639ae4]
        at org.bukkit.craftbukkit.v1_13_R2.CraftServer.dispatchServerCommand(CraftServer.java:684) [spigot.jar:git-Spigot-f6a273b-a639ae4]
        at net.minecraft.server.v1_13_R2.DedicatedServer.aU(DedicatedServer.java:459) [spigot.jar:git-Spigot-f6a273b-a639ae4]
        at net.minecraft.server.v1_13_R2.DedicatedServer.b(DedicatedServer.java:418) [spigot.jar:git-Spigot-f6a273b-a639ae4]
        at net.minecraft.server.v1_13_R2.MinecraftServer.a(MinecraftServer.java:835) [spigot.jar:git-Spigot-f6a273b-a639ae4]
        at net.minecraft.server.v1_13_R2.MinecraftServer.run(MinecraftServer.java:733) [spigot.jar:git-Spigot-f6a273b-a639ae4]
        at java.lang.Thread.run(Thread.java:748) [?:1.8.0_181]
Caused by: java.lang.ClassCastException: org.bukkit.craftbukkit.v1_13_R2.command.ColouredConsoleSender cannot be cast to org.bukkit.entity.Player
        at com.minelazz.epicworldgenerator.q.onCommand(pi:219) ~[?:?]
        at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44) ~[spigot.jar:git-Spigot-f6a273b-a639ae4]
        ... 8 more
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