MissingReferenceException: The object of type 'FieldMonsterVisual' has been destroyed but you are still trying to access it.
Your script should either check if it is null or you should not destroy the object.
UnityEngine.Component.GetComponent[FieldMonsterWrapper] () (at C:/buildslave/unity/build/Runtime/Export/Component.bindings.cs:42)
BattlefieldScripts.FieldMonsterVisual.get_Wrapper () (at Assets/Scripts/BattlefieldScripts/Monsters/VisualElement/FieldMonsterVisual.cs:57)
BattlefieldScripts.FieldMonster.IsNotImmune (SkillType skill) (at Assets/Scripts/BattlefieldScripts/Monsters/FieldMonster.cs:1499)
BattlefieldScripts.Actions.BitStaticFilter.CheckFilter (Vector2 pos, BattlefieldScripts.FieldMonster mon, BattlefieldScripts.FieldElement affectedParameter, SkillType skill, BattlefieldScripts.Actions.BitFilter requester) (at Assets/Scripts/BattlefieldScripts/Monsters/Bits/Modifiers/BitStaticFilter.cs:86)
BattlefieldScripts.Actions.FriendFilter.CheckFilter (Vector2 pos, BattlefieldScripts.FieldMonster mon, BattlefieldScripts.FieldElement affectedParameter, SkillType skill, BattlefieldScripts.Actions.BitFilter requester) (at Assets/Scripts/BattlefieldScripts/Monsters/Bits/Modifiers/FriendFilter.cs:16)
BattlefieldScripts.Actions.BitStaticFilter+<GetRightMonsters>c__Iterator0.MoveNext () (at Assets/Scripts/BattlefieldScripts/Monsters/Bits/Modifiers/BitStaticFilter.cs:74)
BattlefieldScripts.Actions.BitStaticFilter+<GetRightMonsters>c__Iterator0.MoveNext () (at Assets/Scripts/BattlefieldScripts/Monsters/Bits/Modifiers/BitStaticFilter.cs:42)
BattlefieldScripts.Actions.BitFilter+<GetRightMonsters>c__Iterator0.MoveNext () (at Assets/Scripts/BattlefieldScripts/Monsters/Bits/Modifiers/BitFilter.cs:57)
BattlefieldScripts.Actions.ActionBit.Perform (BattlefieldScripts.FieldElement affectedParameter, System.Action`2 OnPerformed, IEnumerable`1 reducedSet) (at Assets/Scripts/BattlefieldScripts/Monsters/Bits/ActionBit.cs:343)
BattlefieldScripts.Actions.MultiskillAction+<PerformAction>c__AnonStorey1.<>m__0 (BattlefieldScripts.Actions.ActionBit actionBit, System.Action callback) (at Assets/Scripts/BattlefieldScripts/Monsters/Bits/Actions/MultiSkillAction.cs:57)
BattlefieldScripts.AnimatedIterator+<IterateOnActions>c__AnonStorey1`1[BattlefieldScripts.Actions.ActionBit].<>m__0 () (at Assets/Scripts/BattlefieldScripts/AnimatedIterator.cs:41)
BattlefieldScripts.AnimatedIterator+<IterateOnActions>c__AnonStorey0`1[BattlefieldScripts.Actions.ActionBit].<>m__1 () (at Assets/Scripts/BattlefieldScripts/AnimatedIterator.cs:35)
BattlefieldScripts.Actions.MultiskillAction+<PerformAction>c__AnonStorey1+<PerformAction>c__AnonStorey2.<>m__1 () (at Assets/Scripts/BattlefieldScripts/Monsters/Bits/Actions/MultiSkillAction.cs:63)
NewAssets.Scripts.UtilScripts.Initializer+<WaitForProcedureEnumerator>c__Iterator4.MoveNext () (at Assets/Scripts/UtilScripts/Initializer.cs:479)
UnityEngine.SetupCoroutine.InvokeMoveNext (IEnumerator enumerator, IntPtr returnValueAddress) (at C:/buildslave/unity/build/Runtime/Export/Coroutines.cs:17)