Sorry, forgot the stack
Pool Boss has not initialized (does so in Awake event and may take additional frames if you configured it that way) and is not ready to be used yet. Check that PoolBoss.IsReady returns true before calling other methods.
UnityEngine.Debug:LogError(Object)
DarkTonic.CoreGameKit.LevelSettings:LogIfNew(String, Boolean) (at Assets/Plugins/DarkTonic/CoreGameKit/Scripts/Level/LevelSettings.cs:1231)
DarkTonic.CoreGameKit.PoolBoss:Spawn(Transform, Vector3, Quaternion, Transform) (at Assets/Plugins/DarkTonic/CoreGameKit/Scripts/PoolBoss/PoolBoss.cs:656)
DarkTonic.CoreGameKit.PoolBoss:SpawnInPool(Transform, Vector3, Quaternion) (at Assets/Plugins/DarkTonic/CoreGameKit/Scripts/PoolBoss/PoolBoss.cs:386)
CoreGameKitPoolBossSpawn:SpawnOne() (at Assets/Plugins/DarkTonic/CoreGameKit/PlaymakerCustomActions/CoreGameKitPoolBossSpawn.cs:103)
CoreGameKitPoolBossSpawn:OnEnter() (at Assets/Plugins/DarkTonic/CoreGameKit/PlaymakerCustomActions/CoreGameKitPoolBossSpawn.cs:41)
HutongGames.PlayMaker.FsmState:ActivateActions(Int32) (at C:/Projects/Playmaker_1.9.0/Projects/Playmaker.source.unity/Assets/PlayMaker/Classes/FsmState.cs:205)
HutongGames.PlayMaker.FsmState:OnEnter() (at C:/Projects/Playmaker_1.9.0/Projects/Playmaker.source.unity/Assets/PlayMaker/Classes/FsmState.cs:175)
HutongGames.PlayMaker.Fsm:EnterState(FsmState) (at C:/Projects/Playmaker_1.9.0/Projects/Playmaker.source.unity/Assets/PlayMaker/Classes/Fsm.cs:2767)
HutongGames.PlayMaker.Fsm:SwitchState(FsmState) (at C:/Projects/Playmaker_1.9.0/Projects/Playmaker.source.unity/Assets/PlayMaker/Classes/Fsm.cs:2714)
HutongGames.PlayMaker.Fsm:UpdateStateChanges() (at C:/Projects/Playmaker_1.9.0/Projects/Playmaker.source.unity/Assets/PlayMaker/Classes/Fsm.cs:2642)
HutongGames.PlayMaker.Fsm:Start() (at C:/Projects/Playmaker_1.9.0/Projects/Playmaker.source.unity/Assets/PlayMaker/Classes/Fsm.cs:1925)
HutongGames.PlayMaker.Fsm:ProcessEvent(FsmEvent, FsmEventData) (at C:/Projects/Playmaker_1.9.0/Projects/Playmaker.source.unity/Assets/PlayMaker/Classes/Fsm.cs:2212)
HutongGames.PlayMaker.Fsm:Event(FsmEventTarget, FsmEvent) (at C:/Projects/Playmaker_1.9.0/Projects/Playmaker.source.unity/Assets/PlayMaker/Classes/Fsm.cs:2375)
HutongGames.PlayMaker.Fsm:Event(FsmEvent) (at C:/Projects/Playmaker_1.9.0/Projects/Playmaker.source.unity/Assets/PlayMaker/Classes/Fsm.cs:2456)
PlayMakerFSM:OnDisable() (at C:/Projects/Playmaker_1.9.0/Projects/Playmaker.source.unity/Assets/PlayMaker/PlayMakerFSM.cs:631)
UnityEngine.GameObject:SetActive(Boolean)
DarkTonic.CoreGameKit.SpawnUtility:SetActive(GameObject, Boolean) (at Assets/Plugins/DarkTonic/CoreGameKit/Scripts/Utility/SpawnUtility.cs:137)
DarkTonic.CoreGameKit.PoolBoss:InstantiateForPool(Transform, Int32) (at Assets/Plugins/DarkTonic/CoreGameKit/Scripts/PoolBoss/PoolBoss.cs:218)
DarkTonic.CoreGameKit.PoolBoss:CreatePoolItemClones(PoolBossItem, Boolean) (at Assets/Plugins/DarkTonic/CoreGameKit/Scripts/PoolBoss/PoolBoss.cs:320)
DarkTonic.CoreGameKit.PoolBoss:ContinueInit() (at Assets/Plugins/DarkTonic/CoreGameKit/Scripts/PoolBoss/PoolBoss.cs:182)
DarkTonic.CoreGameKit.PoolBoss:Initialize() (at Assets/Plugins/DarkTonic/CoreGameKit/Scripts/PoolBoss/PoolBoss.cs:153)
DarkTonic.CoreGameKit.PoolBoss:Awake() (at Assets/Plugins/DarkTonic/CoreGameKit/Scripts/PoolBoss/PoolBoss.cs:127)
Assertion failed: Assertion failed on expression: 'go.IsActive() && go.GetTag() != 0'
UnityEngine.Camera:get_main()
HutongGames.PlayMaker.Actions.IsVisibleInCameraFrustrum:DoIsVisible() (at Assets/PlayMaker Custom Actions/GameObject/IsVisibleInCameraFrustrum.cs:84)
HutongGames.PlayMaker.Actions.IsVisibleInCameraFrustrum:OnEnter() (at Assets/PlayMaker Custom Actions/GameObject/IsVisibleInCameraFrustrum.cs:52)
HutongGames.PlayMaker.FsmState:ActivateActions(Int32) (at C:/Projects/Playmaker_1.9.0/Projects/Playmaker.source.unity/Assets/PlayMaker/Classes/FsmState.cs:205)
HutongGames.PlayMaker.FsmState:OnEnter() (at C:/Projects/Playmaker_1.9.0/Projects/Playmaker.source.unity/Assets/PlayMaker/Classes/FsmState.cs:175)
HutongGames.PlayMaker.Fsm:EnterState(FsmState) (at C:/Projects/Playmaker_1.9.0/Projects/Playmaker.source.unity/Assets/PlayMaker/Classes/Fsm.cs:2767)
HutongGames.PlayMaker.Fsm:SwitchState(FsmState) (at C:/Projects/Playmaker_1.9.0/Projects/Playmaker.source.unity/Assets/PlayMaker/Classes/Fsm.cs:2714)
HutongGames.PlayMaker.Fsm:UpdateStateChanges() (at C:/Projects/Playmaker_1.9.0/Projects/Playmaker.source.unity/Assets/PlayMaker/Classes/Fsm.cs:2642)
HutongGames.PlayMaker.Fsm:Start() (at C:/Projects/Playmaker_1.9.0/Projects/Playmaker.source.unity/Assets/PlayMaker/Classes/Fsm.cs:1925)
HutongGames.PlayMaker.Fsm:ProcessEvent(FsmEvent, FsmEventData) (at C:/Projects/Playmaker_1.9.0/Projects/Playmaker.source.unity/Assets/PlayMaker/Classes/Fsm.cs:2212)
HutongGames.PlayMaker.Fsm:Event(FsmEventTarget, FsmEvent) (at C:/Projects/Playmaker_1.9.0/Projects/Playmaker.source.unity/Assets/PlayMaker/Classes/Fsm.cs:2375)
HutongGames.PlayMaker.Fsm:Event(FsmEvent) (at C:/Projects/Playmaker_1.9.0/Projects/Playmaker.source.unity/Assets/PlayMaker/Classes/Fsm.cs:2456)
PlayMakerFSM:OnDisable() (at C:/Projects/Playmaker_1.9.0/Projects/Playmaker.source.unity/Assets/PlayMaker/PlayMakerFSM.cs:631)
UnityEngine.GameObject:SetActive(Boolean)
DarkTonic.CoreGameKit.SpawnUtility:SetActive(GameObject, Boolean) (at Assets/Plugins/DarkTonic/CoreGameKit/Scripts/Utility/SpawnUtility.cs:137)
DarkTonic.CoreGameKit.PoolBoss:InstantiateForPool(Transform, Int32) (at Assets/Plugins/DarkTonic/CoreGameKit/Scripts/PoolBoss/PoolBoss.cs:218)
DarkTonic.CoreGameKit.PoolBoss:CreatePoolItemClones(PoolBossItem, Boolean) (at Assets/Plugins/DarkTonic/CoreGameKit/Scripts/PoolBoss/PoolBoss.cs:320)
DarkTonic.CoreGameKit.PoolBoss:ContinueInit() (at Assets/Plugins/DarkTonic/CoreGameKit/Scripts/PoolBoss/PoolBoss.cs:182)
DarkTonic.CoreGameKit.PoolBoss:Initialize() (at Assets/Plugins/DarkTonic/CoreGameKit/Scripts/PoolBoss/PoolBoss.cs:153)
DarkTonic.CoreGameKit.PoolBoss:Awake() (at Assets/Plugins/DarkTonic/CoreGameKit/Scripts/PoolBoss/PoolBoss.cs:127)
Could not spawn: RandomDebris
UnityEngine.Debug:LogError(Object)
CoreGameKitPoolBossSpawn:SpawnOne() (at Assets/Plugins/DarkTonic/CoreGameKit/PlaymakerCustomActions/CoreGameKitPoolBossSpawn.cs:105)
CoreGameKitPoolBossSpawn:OnEnter() (at Assets/Plugins/DarkTonic/CoreGameKit/PlaymakerCustomActions/CoreGameKitPoolBossSpawn.cs:41)
HutongGames.PlayMaker.FsmState:ActivateActions(Int32) (at C:/Projects/Playmaker_1.9.0/Projects/Playmaker.source.unity/Assets/PlayMaker/Classes/FsmState.cs:205)
HutongGames.PlayMaker.FsmState:OnEnter() (at C:/Projects/Playmaker_1.9.0/Projects/Playmaker.source.unity/Assets/PlayMaker/Classes/FsmState.cs:175)
HutongGames.PlayMaker.Fsm:EnterState(FsmState) (at C:/Projects/Playmaker_1.9.0/Projects/Playmaker.source.unity/Assets/PlayMaker/Classes/Fsm.cs:2767)
HutongGames.PlayMaker.Fsm:SwitchState(FsmState) (at C:/Projects/Playmaker_1.9.0/Projects/Playmaker.source.unity/Assets/PlayMaker/Classes/Fsm.cs:2714)
HutongGames.PlayMaker.Fsm:UpdateStateChanges() (at C:/Projects/Playmaker_1.9.0/Projects/Playmaker.source.unity/Assets/PlayMaker/Classes/Fsm.cs:2642)
HutongGames.PlayMaker.Fsm:Start() (at C:/Projects/Playmaker_1.9.0/Projects/Playmaker.source.unity/Assets/PlayMaker/Classes/Fsm.cs:1925)
HutongGames.PlayMaker.Fsm:ProcessEvent(FsmEvent, FsmEventData) (at C:/Projects/Playmaker_1.9.0/Projects/Playmaker.source.unity/Assets/PlayMaker/Classes/Fsm.cs:2212)
HutongGames.PlayMaker.Fsm:Event(FsmEventTarget, FsmEvent) (at C:/Projects/Playmaker_1.9.0/Projects/Playmaker.source.unity/Assets/PlayMaker/Classes/Fsm.cs:2375)
HutongGames.PlayMaker.Fsm:Event(FsmEvent) (at C:/Projects/Playmaker_1.9.0/Projects/Playmaker.source.unity/Assets/PlayMaker/Classes/Fsm.cs:2456)
PlayMakerFSM:OnDisable() (at C:/Projects/Playmaker_1.9.0/Projects/Playmaker.source.unity/Assets/PlayMaker/PlayMakerFSM.cs:631)
UnityEngine.GameObject:SetActive(Boolean)
DarkTonic.CoreGameKit.SpawnUtility:SetActive(GameObject, Boolean) (at Assets/Plugins/DarkTonic/CoreGameKit/Scripts/Utility/SpawnUtility.cs:137)
DarkTonic.CoreGameKit.PoolBoss:InstantiateForPool(Transform, Int32) (at Assets/Plugins/DarkTonic/CoreGameKit/Scripts/PoolBoss/PoolBoss.cs:218)
DarkTonic.CoreGameKit.PoolBoss:CreatePoolItemClones(PoolBossItem, Boolean) (at Assets/Plugins/DarkTonic/CoreGameKit/Scripts/PoolBoss/PoolBoss.cs:320)
DarkTonic.CoreGameKit.PoolBoss:ContinueInit() (at Assets/Plugins/DarkTonic/CoreGameKit/Scripts/PoolBoss/PoolBoss.cs:182)
DarkTonic.CoreGameKit.PoolBoss:Initialize() (at Assets/Plugins/DarkTonic/CoreGameKit/Scripts/PoolBoss/PoolBoss.cs:153)
DarkTonic.CoreGameKit.PoolBoss:Awake() (at Assets/Plugins/DarkTonic/CoreGameKit/Scripts/PoolBoss/PoolBoss.cs:127)
No game object specified for 'Other Object For Position'
UnityEngine.Debug:LogError(Object)
CoreGameKitPoolBossSpawn:SpawnOne() (at Assets/Plugins/DarkTonic/CoreGameKit/PlaymakerCustomActions/CoreGameKitPoolBossSpawn.cs:95)
CoreGameKitPoolBossSpawn:OnEnter() (at Assets/Plugins/DarkTonic/CoreGameKit/PlaymakerCustomActions/CoreGameKitPoolBossSpawn.cs:41)
HutongGames.PlayMaker.FsmState:ActivateActions(Int32) (at C:/Projects/Playmaker_1.9.0/Projects/Playmaker.source.unity/Assets/PlayMaker/Classes/FsmState.cs:205)
HutongGames.PlayMaker.FsmState:OnEnter() (at C:/Projects/Playmaker_1.9.0/Projects/Playmaker.source.unity/Assets/PlayMaker/Classes/FsmState.cs:175)
HutongGames.PlayMaker.Fsm:EnterState(FsmState) (at C:/Projects/Playmaker_1.9.0/Projects/Playmaker.source.unity/Assets/PlayMaker/Classes/Fsm.cs:2767)
HutongGames.PlayMaker.Fsm:SwitchState(FsmState) (at C:/Projects/Playmaker_1.9.0/Projects/Playmaker.source.unity/Assets/PlayMaker/Classes/Fsm.cs:2714)
HutongGames.PlayMaker.Fsm:UpdateStateChanges() (at C:/Projects/Playmaker_1.9.0/Projects/Playmaker.source.unity/Assets/PlayMaker/Classes/Fsm.cs:2642)
HutongGames.PlayMaker.Fsm:Start() (at C:/Projects/Playmaker_1.9.0/Projects/Playmaker.source.unity/Assets/PlayMaker/Classes/Fsm.cs:1925)
HutongGames.PlayMaker.Fsm:ProcessEvent(FsmEvent, FsmEventData) (at C:/Projects/Playmaker_1.9.0/Projects/Playmaker.source.unity/Assets/PlayMaker/Classes/Fsm.cs:2212)
HutongGames.PlayMaker.Fsm:Event(FsmEventTarget, FsmEvent) (at C:/Projects/Playmaker_1.9.0/Projects/Playmaker.source.unity/Assets/PlayMaker/Classes/Fsm.cs:2375)
HutongGames.PlayMaker.Fsm:Event(FsmEvent) (at C:/Projects/Playmaker_1.9.0/Projects/Playmaker.source.unity/Assets/PlayMaker/Classes/Fsm.cs:2456)
PlayMakerFSM:OnDisable() (at C:/Projects/Playmaker_1.9.0/Projects/Playmaker.source.unity/Assets/PlayMaker/PlayMakerFSM.cs:631)
UnityEngine.GameObject:SetActive(Boolean)
DarkTonic.CoreGameKit.SpawnUtility:SetActive(GameObject, Boolean) (at Assets/Plugins/DarkTonic/CoreGameKit/Scripts/Utility/SpawnUtility.cs:137)
DarkTonic.CoreGameKit.PoolBoss:InstantiateForPool(Transform, Int32) (at Assets/Plugins/DarkTonic/CoreGameKit/Scripts/PoolBoss/PoolBoss.cs:218)
DarkTonic.CoreGameKit.PoolBoss:CreatePoolItemClones(PoolBossItem, Boolean) (at Assets/Plugins/DarkTonic/CoreGameKit/Scripts/PoolBoss/PoolBoss.cs:320)
DarkTonic.CoreGameKit.PoolBoss:ContinueInit() (at Assets/Plugins/DarkTonic/CoreGameKit/Scripts/PoolBoss/PoolBoss.cs:182)
DarkTonic.CoreGameKit.PoolBoss:Initialize() (at Assets/Plugins/DarkTonic/CoreGameKit/Scripts/PoolBoss/PoolBoss.cs:153)
DarkTonic.CoreGameKit.PoolBoss:Awake() (at Assets/Plugins/DarkTonic/CoreGameKit/Scripts/PoolBoss/PoolBoss.cs:127)