NullReferenceException: Object reference not set to an instance of an object

Oxyfern.OnUprooted (System.Object data) (at C:/jenkins_workspace/workspace/Preview_Simgame_Windows/game/Assets/scripts/game/Plants/Oxyfern.cs:141)
Oxyfern+<>c.<.cctor>b__16_0 (Oxyfern component, System.Object data) (at C:/jenkins_workspace/workspace/Preview_Simgame_Windows/game/Assets/scripts/game/Plants/Oxyfern.cs:134)
EventSystem+IntraObjectHandler`1[ComponentType].Trigger (UnityEngine.GameObject gameObject, System.Object eventData) (at C:/jenkins_workspace/workspace/Preview_Simgame_Windows/game/Assets/Plugins/Klei/util/EventSystem.cs:112)
EventSystem.Trigger (UnityEngine.GameObject go, System.Int32 hash, System.Object data) (at C:/jenkins_workspace/workspace/Preview_Simgame_Windows/game/Assets/Plugins/Klei/util/EventSystem.cs:149)
KMonoBehaviour.Trigger (System.Int32 hash, System.Object data) (at C:/jenkins_workspace/workspace/Preview_Simgame_Windows/game/Assets/Plugins/Klei/util/KMonoBehaviour.cs:450)
UprootedMonitor.OnGroundChanged (System.Object callbackData) (at C:/jenkins_workspace/workspace/Preview_Simgame_Windows/game/Assets/scripts/game/Creatures/common/UprootedMonitor.cs:110)
ScenePartitioner.RunEntries (System.Collections.Generic.List`1[T] gathered_entries, System.Object event_data) (at C:/jenkins_workspace/workspace/Preview_Simgame_Windows/game/Assets/scripts/game/ScenePartitioner/ScenePartitioner.cs:394)
ScenePartitioner.TriggerEvent (System.Collections.Generic.List`1[T] cells, ScenePartitionerLayer layer, System.Object event_data) (at C:/jenkins_workspace/workspace/Preview_Simgame_Windows/game/Assets/scripts/game/ScenePartitioner/ScenePartitioner.cs:306)
GameScenePartitioner.TriggerEvent (System.Collections.Generic.List`1[T] cells, ScenePartitionerLayer layer, System.Object event_data) (at C:/jenkins_workspace/workspace/Preview_Simgame_Windows/game/Assets/scripts/game/ScenePartitioner/GameScenePartitioner.cs:161)
World.UpdateCellInfo (System.Collections.Generic.List`1[T] solidInfo, System.Collections.Generic.List`1[T] callbackInfo, System.Int32 num_solid_substance_change_info, Sim+SolidSubstanceChangeInfo* solid_substance_change_info, System.Int32 num_liquid_change_info, Sim+LiquidChangeInfo* liquid_change_info) (at C:/jenkins_workspace/workspace/Preview_Simgame_Windows/game/Assets/scripts/game/World.cs:106)
Game.UnsafeSim200ms (System.Single dt) (at C:/jenkins_workspace/workspace/Preview_Simgame_Windows/game/Assets/scripts/game/Game.cs:1453)
Game.SimEveryTick (System.Single dt) (at C:/jenkins_workspace/workspace/Preview_Simgame_Windows/game/Assets/scripts/game/Game.cs:1399)
Game.Update () (at C:/jenkins_workspace/workspace/Preview_Simgame_Windows/game/Assets/scripts/game/Game.cs:1366)

Build: U44-534208-SD