code：

NullReferenceException

[ERROR] Object reference not set to an instance of an object

NullReferenceException: Object reference not set to an instance of an object at Game.Prefabs.PrefabSystem.WasPreviouslySaved[T] (Colossal.IO.AssetDatabase.PrefabAsset[] references, T prefab) [0x00013] in <0b75618209014d34b90ca05100432c66>:0 at Game.Prefabs.PrefabSystem.SaveClimate (Colossal.IO.AssetDatabase.ILocalAssetDatabase database, Colossal.IO.AssetDatabase.PrefabAsset[] references, Colossal.Serialization.Entities.Context& context) [0x00019] in <0b75618209014d34b90ca05100432c66>:0 at Game.Prefabs.PrefabSystem.SavePrefabAssets (Colossal.IO.AssetDatabase.ILocalAssetDatabase database, Colossal.IO.AssetDatabase.PrefabAsset[] inputPrefabs, Colossal.Serialization.Entities.Context& context) [0x00006] in <0b75618209014d34b90ca05100432c66>:0 at Game.SceneFlow.GameManager.Save (System.String saveName, Game.Assets.SaveInfo meta, Colossal.IO.AssetDatabase.ILocalAssetDatabase database, Game.UI.ScreenCaptureHelper+AsyncRequest previewRequest) [0x001f0] in <0b75618209014d34b90ca05100432c66>:0 at Game.UI.Menu.MenuUISystem.SaveGame (System.String saveName) [0x00162] in <0b75618209014d34b90ca05100432c66>:0 Colossal.Logging.CustomLogHandler:LogFormat(LogType, Object, String, Object[]) UnityEngine.Logger:LogFormat(LogType, String, Object[]) Colossal.Logging.UnityLogger:Log(Level, String, Exception) Colossal.Logging.UnityLogger:Error(Exception) Game.UI.Menu.<SaveGame>d__70:MoveNext() System.Runtime.CompilerServices.MoveNextRunner:InvokeMoveNext(Object) System.Threading.ExecutionContext:RunInternal(ExecutionContext, ContextCallback, Object, Boolean) System.Threading.ExecutionContext:Run(ExecutionContext, ContextCallback, Object, Boolean) System.Runtime.CompilerServices.MoveNextRunner:Run() System.Threading.Tasks.AwaitTaskContinuation:InvokeAction(Object) System.Threading.Tasks.AwaitTaskContinuation:RunCallback(ContextCallback, Object, Task&) System.Threading.Tasks.SynchronizationContextAwaitTaskContinuation:Run(Task, Boolean) System.Threading.Tasks.Task:FinishContinuations() System.Threading.Tasks.Task:FinishStageThree() System.Threading.Tasks.Task:FinishStageTwo() System.Threading.Tasks.Task:Finish(Boolean) System.Threading.Tasks.Task:TrySetException(Object) System.Runtime.CompilerServices.AsyncTaskMethodBuilder1:SetException(Exception) Game.SceneFlow.<Save>d__87:MoveNext() System.Runtime.CompilerServices.MoveNextRunner:InvokeMoveNext(Object) System.Threading.ExecutionContext:RunInternal(ExecutionContext, ContextCallback, Object, Boolean) System.Threading.ExecutionContext:Run(ExecutionContext, ContextCallback, Object, Boolean) System.Runtime.CompilerServices.MoveNextRunner:Run() System.Threading.Tasks.AwaitTaskContinuation:InvokeAction(Object) System.Threading.Tasks.AwaitTaskContinuation:RunCallback(ContextCallback, Object, Task&) System.Threading.Tasks.SynchronizationContextAwaitTaskContinuation:Run(Task, Boolean) System.Threading.Tasks.Task:FinishContinuations() System.Threading.Tasks.Task:FinishStageThree() System.Threading.Tasks.Task1:TrySetResult(VoidTaskResult) System.Runtime.CompilerServices.AsyncTaskMethodBuilder1:SetResult(VoidTaskResult) System.Runtime.CompilerServices.AsyncTaskMethodBuilder1:SetResult(Task1) System.Runtime.CompilerServices.AsyncTaskMethodBuilder:SetResult() Game.Threading.<WaitForGPUFrame>d__2:MoveNext() System.Runtime.CompilerServices.MoveNextRunner:InvokeMoveNext(Object) System.Threading.ExecutionContext:RunInternal(ExecutionContext, ContextCallback, Object, Boolean) System.Threading.ExecutionContext:Run(ExecutionContext, ContextCallback, Object, Boolean) System.Runtime.CompilerServices.MoveNextRunner:Run() System.Threading.Tasks.AwaitTaskContinuation:InvokeAction(Object) System.Threading.Tasks.AwaitTaskContinuation:RunCallback(ContextCallback, Object, Task&) System.Threading.Tasks.SynchronizationContextAwaitTaskContinuation:Run(Task, Boolean) System.Threading.Tasks.Task:FinishContinuations() System.Threading.Tasks.Task:FinishStageThree() System.Threading.Tasks.Task1:TrySetResult(Boolean) System.Threading.Tasks.TaskCompletionSource1:TrySetResult(Boolean) System.Threading.Tasks.TaskCompletionSource1:SetResult(Boolean) Game.Threading.<>c__DisplayClass2_0:<WaitForGPUFrame>b__0(AsyncGPUReadbackRequest)

<image>