Fail to call something

When I use command, it's show -

> convoystart nightmare (My Command line)
 

[Convoy] The event has been successfully launched!
Failed to call hook 'SpawnNpc' on plugin 'NpcSpawn v2.8.0' (NullReferenceException: Object reference not set to an instance of an object)
  at Oxide.Plugins.NpcSpawn.CreateCustomNpc (UnityEngine.Vector3 position, Oxide.Plugins.NpcSpawn+NpcConfig config) [0x0001c] in <cd7faeb51484474d8a295b58dc519fef>:0
  at Oxide.Plugins.NpcSpawn.SpawnNpc (UnityEngine.Vector3 position, Newtonsoft.Json.Linq.JObject configJson) [0x00008] in <cd7faeb51484474d8a295b58dc519fef>:0
  at Oxide.Plugins.NpcSpawn.DirectCallHook (System.String name, System.Object& ret, System.Object[] args) [0x000b0] in <cd7faeb51484474d8a295b58dc519fef>:0
  at Oxide.Plugins.CSharpPlugin.InvokeMethod (Oxide.Core.Plugins.HookMethod method, System.Object[] args) [0x00079] in <42f9bedc659b4f4786eb778d3cd58968>:0
  at Oxide.Core.Plugins.CSPlugin.OnCallHook (System.String name, System.Object[] args) [0x000de] in <8cb2d664f1574f2b96d53f1c1869d96a>:0
  at Oxide.Core.Plugins.Plugin.CallHook (System.String hook, System.Object[] args) [0x00060] in <8cb2d664f1574f2b96d53f1c1869d96a>:0
NullReferenceException: Object reference not set to an instance of an object

Am I do something wrong? Please help me, thank you.

Hello. 
Delete config and try default one
If that doesn't help, make sure you have the latest version of Convoy and NpcSpawn.

Dear Adem,

I already confirm my Server Status:

1. NpcSpawn are V2.8.0 - Newest Version

2. Convoy Reforged are 2.7.4 - Newest Version

3. Server program version - Newest Version

4. Oxide - Newest Version

5. Delete config and all are default new one

System told me:

[Warning] [Convoy] The event has been successfully launched!

But RCON still show same error, And did not see any event show on map.

[Error] Failed to call hook 'SpawnNpc' on plugin 'NpcSpawn v2.8.0' (NullReferenceException: Object reference not set to an instance of an object)
  at Oxide.Plugins.NpcSpawn.CreateCustomNpc (UnityEngine.Vector3 position, Oxide.Plugins.NpcSpawn+NpcConfig config) [0x0001c] in <4b9cfd90c9d341f399748a5410e6371f>:0 
  at Oxide.Plugins.NpcSpawn.SpawnNpc (UnityEngine.Vector3 position, Newtonsoft.Json.Linq.JObject configJson) [0x00008] in <4b9cfd90c9d341f399748a5410e6371f>:0 
  at Oxide.Plugins.NpcSpawn.DirectCallHook (System.String name, System.Object& ret, System.Object[] args) [0x000b0] in <4b9cfd90c9d341f399748a5410e6371f>:0 
  at Oxide.Plugins.CSharpPlugin.InvokeMethod (Oxide.Core.Plugins.HookMethod method, System.Object[] args) [0x00079] in <42f9bedc659b4f4786eb778d3cd58968>:0 
  at Oxide.Core.Plugins.CSPlugin.OnCallHook (System.String name, System.Object[] args) [0x000de] in <8cb2d664f1574f2b96d53f1c1869d96a>:0 
  at Oxide.Core.Plugins.Plugin.CallHook (System.String hook, System.Object[] args) [0x00060] in <8cb2d664f1574f2b96d53f1c1869d96a>:0 

So, any way can fix it?

Hi. Contact me at the discord. I'll need you to turn on the demo screen for me. And we'll fix it. I do not know what the problem is yet.
adem9554

Can you check this ticket from Npc Spawn?

https://codefling.com/files/support/20646-latest-update-broken./

I think it's same problem for Dynamic monuments plugin.

I will connect to you, but It's may happened with many plugin depends on Npc Spawn.

I also have another plugin having similar problems, Better Npc also depends on Npc Spawn.