I tried googling it and every paying around with it in my config file but every time i try to clone the Npc or edit the model of the Npc on the server it doesn't seem to work. I looked into my logs and this is what I got. the first error is editing the moble and the second was cloning error.
05.04 17:33:08 [Server] Server thread/FATAL Error executing task
05.04 17:33:08 [Server] INFO java.util.concurrent.ExecutionException: java.lang.NoClassDefFoundError: net/mcreator/aquaticabyssmod/MCreatorTrident$RenderCustom
05.04 17:33:08 [Server] INFO at java.util.concurrent.FutureTask.report(FutureTask.java:122) ~[?:1.8.0_282]
05.04 17:33:08 [Server] INFO at java.util.concurrent.FutureTask.get(FutureTask.java:192) ~[?:1.8.0_282]
05.04 17:33:08 [Server] INFO at net.minecraft.util.Util.func_181617_a(SourceFile:47) [h.class:?]
05.04 17:33:08 [Server] INFO at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:723) [MinecraftServer.class:?]
05.04 17:33:08 [Server] INFO at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServer.java:397) [nz.class:?]
05.04 17:33:08 [Server] INFO at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:668) [MinecraftServer.class:?]
05.04 17:33:08 [Server] INFO at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:526) [MinecraftServer.class:?]
05.04 17:33:08 [Server] INFO at java.lang.Thread.run(Thread.java:748) [?:1.8.0_282]
05.04 17:33:08 [Server] INFO Caused by: java.lang.NoClassDefFoundError: net/mcreator/aquaticabyssmod/MCreatorTrident$RenderCustom
05.04 17:33:08 [Server] INFO at java.lang.Class.getDeclaringClass0(Native Method) ~[?:1.8.0_282]
05.04 17:33:08 [Server] INFO at java.lang.Class.getDeclaringClass(Class.java:1235) ~[?:1.8.0_282]
05.04 17:33:08 [Server] INFO at java.lang.Class.getEnclosingClass(Class.java:1277) ~[?:1.8.0_282]
05.04 17:33:08 [Server] INFO at java.lang.Class.getCanonicalName(Class.java:1392) ~[?:1.8.0_282]
05.04 17:33:08 [Server] INFO at noppes.npcs.ModelDataShared.setEntityClass(ModelDataShared.java:134) ~[ModelDataShared.class:?]
05.04 17:33:08 [Server] INFO at noppes.npcs.ModelDataShared.readFromNBT(ModelDataShared.java:62) ~[ModelDataShared.class:?]
05.04 17:33:08 [Server] INFO at noppes.npcs.PacketHandlerServer.handlePacket(PacketHandlerServer.java:563) ~[PacketHandlerServer.class:?]
05.04 17:33:08 [Server] INFO at noppes.npcs.PacketHandlerServer.access$200(PacketHandlerServer.java:78) ~[PacketHandlerServer.class:?]
05.04 17:33:08 [Server] INFO at noppes.npcs.PacketHandlerServer$1.run(PacketHandlerServer.java:109) ~[PacketHandlerServer$1.class:?]
05.04 17:33:08 [Server] INFO at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) ~[?:1.8.0_282]
05.04 17:33:08 [Server] INFO at java.util.concurrent.FutureTask.run(FutureTask.java:266) ~[?:1.8.0_282]
05.04 17:33:08 [Server] INFO at net.minecraft.util.Util.func_181617_a(SourceFile:46) ~[h.class:?]
05.04 17:33:08 [Server] INFO ... 5 more
05.04 17:34:02 [Server] Server thread/ERROR [FML]: An Entity customnpcs:customnpc(Andern) has thrown an exception during loading, its state cannot be restored. Report this to the mod author
05.04 17:34:02 [Server] INFO net.minecraft.util.ReportedException: Loading entity NBT
05.04 17:34:02 [Server] INFO at net.minecraft.entity.Entity.func_70020_e(Entity.java:1878) ~[vg.class:?]
05.04 17:34:02 [Server] INFO at net.minecraft.entity.EntityList.func_75615_a(EntityList.java:221) [vi.class:?]
05.04 17:34:02 [Server] INFO at noppes.npcs.NoppesUtilServer.spawnClone(NoppesUtilServer.java:630) [NoppesUtilServer.class:?]
05.04 17:34:02 [Server] INFO at noppes.npcs.PacketHandlerServer.handlePacket(PacketHandlerServer.java:621) [PacketHandlerServer.class:?]
05.04 17:34:02 [Server] INFO at noppes.npcs.PacketHandlerServer.access$200(PacketHandlerServer.java:78) [PacketHandlerServer.class:?]
05.04 17:34:02 [Server] INFO at noppes.npcs.PacketHandlerServer$1.run(PacketHandlerServer.java:109) [PacketHandlerServer$1.class:?]
05.04 17:34:02 [Server] INFO at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [?:1.8.0_282]
05.04 17:34:02 [Server] INFO at java.util.concurrent.FutureTask.run(FutureTask.java:266) [?:1.8.0_282]
05.04 17:34:02 [Server] INFO at net.minecraft.util.Util.func_181617_a(SourceFile:46) [h.class:?]
05.04 17:34:02 [Server] INFO at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:723) [MinecraftServer.class:?]
05.04 17:34:02 [Server] INFO at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServer.java:397) [nz.class:?]
05.04 17:34:02 [Server] INFO at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:668) [MinecraftServer.class:?]
05.04 17:34:02 [Server] INFO at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:526) [MinecraftServer.class:?]
05.04 17:34:02 [Server] INFO at java.lang.Thread.run(Thread.java:748) [?:1.8.0_282]
05.04 17:34:02 [Server] INFO Caused by: java.lang.NoClassDefFoundError: net/mcreator/aquaticabyssmod/MCreatorTrident$RenderCustom
05.04 17:34:02 [Server] INFO at java.lang.Class.getDeclaringClass0(Native Method) ~[?:1.8.0_282]
05.04 17:34:02 [Server] INFO at java.lang.Class.getDeclaringClass(Class.java:1235) ~[?:1.8.0_282]
05.04 17:34:02 [Server] INFO at java.lang.Class.getEnclosingClass(Class.java:1277) ~[?:1.8.0_282]
05.04 17:34:02 [Server] INFO at java.lang.Class.getCanonicalName(Class.java:1392) ~[?:1.8.0_282]
05.04 17:34:02 [Server] INFO at noppes.npcs.ModelDataShared.setEntityClass(ModelDataShared.java:134) ~[ModelDataShared.class:?]
05.04 17:34:02 [Server] INFO at noppes.npcs.ModelDataShared.readFromNBT(ModelDataShared.java:62) ~[ModelDataShared.class:?]
05.04 17:34:02 [Server] INFO at noppes.npcs.entity.EntityCustomNpc.func_70037_a(EntityCustomNpc.java:23) ~[EntityCustomNpc.class:?]
05.04 17:34:02 [Server] INFO at net.minecraft.entity.Entity.func_70020_e(Entity.java:1866) ~[vg.class:?]
05.04 17:34:02 [Server] INFO ... 13 more