any advice would be great thanks.

NullReferenceException: Object reference not set to an instance of an object
at AutoTurret.ServerInit () [0x000be] in <a1a76f898f8c418f92ad32de2c24276b>:0
at NPCAutoTurret.ServerInit () [0x00000] in <a1a76f898f8c418f92ad32de2c24276b>:0
at BaseNetworkable.Spawn () [0x00035] in <a1a76f898f8c418f92ad32de2c24276b>:0
at BaseEntity.Spawn () [0x00000] in <a1a76f898f8c418f92ad32de2c24276b>:0
at IOEntity.Spawn () [0x00000] in <a1a76f898f8c418f92ad32de2c24276b>:0
at BaseEntity.SpawnAsMapEntity () [0x00096] in <a1a76f898f8c418f92ad32de2c24276b>:0
at ServerMgr.SpawnMapEntities () [0x00015] in <a1a76f898f8c418f92ad32de2c24276b>:0
at ServerMgr.Initialize (System.Boolean loadSave, System.String saveFile, System.Boolean allowOutOfDateSaves, System.Boolean skipInitialSpawn) [0x00021] in <a1a76f898f8c418f92ad32de2c24276b>:0
at Bootstrap+<StartServer>d__19.MoveNext () [0x002ff] in <a1a76f898f8c418f92ad32de2c24276b>:0
at UnityEngine.SetupCoroutine.InvokeMoveNext (System.Collections.IEnumerator enumerator, System.IntPtr returnValueAddress) [0x00026] in <745c4d442eef4e08b35b5975d62d89d1>:0

(Filename: <a1a76f898f8c418f92ad32de2c24276b> Line: 0)