Issue with sponge forge 1.12.2 and NPCs V3 (1.12.2)

[KiviTK]

i installed the plugin and tried summoning an NPC and this is the error i got:

Error occurred while executing command 'npc create human' for source EntityPlayerMP['vincinnyo'/21, l='asd', x=1812.58, y=66.00, z=184.72]: org.spongepowered.common.entity.living.human.EntityHuman cannot be cast to me.mrdaniel.npcs.interfaces.mixin.NPCAble

this is the full server log after executing that command

[14:10:35] [Server thread/ERROR] [Sponge]: Error occurred while executing command 'npc create human' for source EntityPlayerMP['vincinnyo'/21, l='asd', x=1812.58, y=66.00, z=184.72]: org.spongepowered.common.entity.living.human.EntityHuman cannot be cast to me.mrdaniel.npcs.interfaces.mixin.NPCAble
java.lang.ClassCastException: org.spongepowered.common.entity.living.human.EntityHuman cannot be cast to me.mrdaniel.npcs.interfaces.mixin.NPCAble
        at me.mrdaniel.npcs.managers.NPCManager.spawn(NPCManager.java:167) ~[NPCManager.class:?]
        at me.mrdaniel.npcs.managers.NPCManager.create(NPCManager.java:136) ~[NPCManager.class:?]
        at me.mrdaniel.npcs.commands.main.CommandCreate.execute(CommandCreate.java:26) ~[CommandCreate.class:?]
        at me.mrdaniel.npcs.commands.PlayerCommand.execute(PlayerCommand.java:19) ~[PlayerCommand.class:?]
        at org.spongepowered.api.command.args.ChildCommandElementExecutor.execute(ChildCommandElementExecutor.java:255) ~[ChildCommandElementExecutor.class:1.12.2-2655-7.1.0-BETA-3064]
        at org.spongepowered.api.command.spec.CommandSpec.process(CommandSpec.java:388) ~[CommandSpec.class:1.12.2-2655-7.1.0-BETA-3064]
        at org.spongepowered.api.command.dispatcher.SimpleDispatcher.process(SimpleDispatcher.java:341) ~[SimpleDispatcher.class:1.12.2-2655-7.1.0-BETA-3064]
        at org.spongepowered.common.command.SpongeCommandManager.process(SpongeCommandManager.java:328) [SpongeCommandManager.class:1.12.2-2655-7.1.0-BETA-3064]
        at net.minecraft.command.ServerCommandManager.func_71556_a(SourceFile:1083) [dh.class:?]
        at net.minecraft.network.NetHandlerPlayServer.func_147361_d(NetHandlerPlayServer.java:958) [pa.class:?]
        at net.minecraft.network.NetHandlerPlayServer.func_147354_a(NetHandlerPlayServer.java:937) [pa.class:?]
        at net.minecraft.network.play.client.CPacketChatMessage.func_148833_a(SourceFile:37) [la.class:?]
        at net.minecraft.network.play.client.CPacketChatMessage.func_148833_a(SourceFile:9) [la.class:?]
        at org.spongepowered.common.network.PacketUtil.onProcessPacket(PacketUtil.java:150) [PacketUtil.class:1.12.2-2655-7.1.0-BETA-3064]
        at net.minecraft.network.PacketThreadUtil$1.redirect$onProcessPacket$zlb000(SourceFile:539) [hv$1.class:?]
        at net.minecraft.network.PacketThreadUtil$1.run(SourceFile:13) [hv$1.class:?]
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [?:1.8.0_162]
        at java.util.concurrent.FutureTask.run(FutureTask.java:266) [?:1.8.0_162]
        at net.minecraft.util.Util.func_181617_a(SourceFile:46) [h.class:?]
        at org.spongepowered.common.SpongeImplHooks.onUtilRunTask(SpongeImplHooks.java:277) [SpongeImplHooks.class:1.12.2-2655-7.1.0-BETA-3064]
        at net.minecraft.server.MinecraftServer.redirect$onRun$zjg000(MinecraftServer.java:3975) [MinecraftServer.class:?]
        at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:721) [MinecraftServer.class:?]
        at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServer.java:396) [nz.class:?]
        at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:666) [MinecraftServer.class:?]
        at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:524) [MinecraftServer.class:?]
        at java.lang.Thread.run(Thread.java:748) [?:1.8.0_162]