Console error -> Failed to call hook 'OnServerInitialized'

11:34:22 o.reload BossMonster
11:34:22 Unloaded plugin BossMonster v2.2.1 by KpucTaJl
11:34:22 [BossMonster] Loading files on the /oxide/data/BossMonster/Bosses/ path has started...
11:34:22 [BossMonster] File Clown has been loaded successfully!
11:34:22 [BossMonster] File Evil has been loaded successfully!
11:34:22 [BossMonster] File Franken has been loaded successfully!
11:34:22 [BossMonster] File Frankenstein has been loaded successfully!
11:34:22 [BossMonster] File Heavy has been loaded successfully!
11:34:22 [BossMonster] File Horror has been loaded successfully!
11:34:22 [BossMonster] File Jason has been loaded successfully!
11:34:22 [BossMonster] File King of the Night has been loaded successfully!
11:34:22 [BossMonster] File Michael Myers has been loaded successfully!
11:34:22 [BossMonster] File Oni has been loaded successfully!
11:34:22 [BossMonster] File Raptor has been loaded successfully!
11:34:22 [BossMonster] File Scary has been loaded successfully!
11:34:22 [BossMonster] Loading files on the /oxide/data/BossMonster/CustomMap/ path has started...
11:34:22 [BossMonster] File Example has been loaded successfully!
11:34:22 Failed to call hook 'OnServerInitialized' on plugin 'BossMonster v2.2.1' (NullReferenceException: Object reference not set to an instance of an object)
at Oxide.Plugins.BossMonster.OnServerInitialized () [0x000c5] in <24dde460c03345819ff4cc1cf946772e>:0
at Oxide.Plugins.BossMonster.DirectCallHook (System.String name, System.Object& ret, System.Object[] args) [0x006fa] in <24dde460c03345819ff4cc1cf946772e>: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 <15f61ddda771464d8246ebdce8ff4811>:0
at Oxide.Core.Plugins.Plugin.CallHook (System.String hook, System.Object[] args) [0x00060] in <15f61ddda771464d8246ebdce8ff4811>:0
11:34:22 Loaded plugin BossMonster v2.2.1 by KpucTaJl

Hello, this error occurred only once when updating the BossMonster version, and most likely because you didn’t update NpcSpawn before updating BossMonster. You can reload the plugin, and this error won’t happen again.