Can't use s4s because of error

Hello. 

I'm not new to s4s and I was using it well. 3 hours ago, I could used s4s without any problem but now it makes a lot of errors.

All activities, such as not being able to import blender files or see objects in cas and objects, are disabled.

The last thing I remember doing was accidentally importing an add-on for The Sims 3 into Blender and importing it into the studio. But of course it didn't work.

But from then on, errors began to appear. 

I also read the trouble shooting article posted on this site, deleted all add-on and reinstalled s4s, blender again. The path to the folder where The Sims 4 is installed is also specified appropriately.

I also set Antivirus exceptions, Run with administrator too. but all of these methods were useless.

The error starts when the following message appears in the middle of the index making process when starting The Sims 4 Studio.

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The Sims 4 Studio - Version 3.1.5.0

System.AggregateException: 하나 이상의 오류가 발생했습니다. ---> System.ArgumentNullException: 값은 null일 수 없습니다.

매개 변수 이름: path1

위치: System.IO.Path.Combine(String path1, String path2, String path3)

위치: S4Studio.Data.FileDb.Sims4FileTable.Init(Boolean load_simulation, Boolean is_reinit)

위치: S4Studio.Shared.AppModel.DoInit()

위치: System.Threading.Tasks.Task.InnerInvoke()

위치: System.Threading.Tasks.Task.Execute()

--- 내부 예외 스택 추적의 끝 ---

---> (내부 예외 #0) System.ArgumentNullException: 값은 null일 수 없습니다.

매개 변수 이름: path1

위치: System.IO.Path.Combine(String path1, String path2, String path3)

위치: S4Studio.Data.FileDb.Sims4FileTable.Init(Boolean load_simulation, Boolean is_reinit)

위치: S4Studio.Shared.AppModel.DoInit()

위치: System.Threading.Tasks.Task.InnerInvoke()

위치: System.Threading.Tasks.Task.Execute()<---

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And this message pops up such as pressing the animation button, exporting a blender file from my project, etc.

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The Sims 4 Studio - Version 3.1.5.0

System.AggregateException: One or more errors occurred. ---> System.NullReferenceException: 개체 참조가 개체의 인스턴스로 설정되지 않았습니다.

at S4Studio.ViewModels.Animation.AnimationPackCustomContent.ExecuteAddAnimation()

at S4Studio.ViewModels.GenericUserCommand.<>c__DisplayClass8_0.<.ctor>b__1(Object y)

at S4Studio.ViewModels.GenericUserCommand.Execute(Object parameter)

at S4Studio.ViewModels.Animation.AnimationPackCustomContent.ExecuteAddPosePack()

at S4Studio.ViewModels.GenericUserCommand.<>c__DisplayClass8_0.<.ctor>b__1(Object y)

at S4Studio.ViewModels.GenericUserCommand.Execute(Object parameter)

at S4Studio.Shared.AnimationFeatureViewModel.Clone(IDBPFPackage package, String hash, IEnumerable`1 selected_prototypes)

at S4Studio.Shared.FeatureViewModel.<>c__DisplayClass28_0.<CreateItem>b__0()

at System.Threading.Tasks.Task.InnerInvoke()

at System.Threading.Tasks.Task.Execute()

--- End of inner exception stack trace ---

---> (Inner Exception #0) System.NullReferenceException: 개체 참조가 개체의 인스턴스로 설정되지 않았습니다.

at S4Studio.ViewModels.Animation.AnimationPackCustomContent.ExecuteAddAnimation()

at S4Studio.ViewModels.GenericUserCommand.<>c__DisplayClass8_0.<.ctor>b__1(Object y)

at S4Studio.ViewModels.GenericUserCommand.Execute(Object parameter)

at S4Studio.ViewModels.Animation.AnimationPackCustomContent.ExecuteAddPosePack()

at S4Studio.ViewModels.GenericUserCommand.<>c__DisplayClass8_0.<.ctor>b__1(Object y)

at S4Studio.ViewModels.GenericUserCommand.Execute(Object parameter)

at S4Studio.Shared.AnimationFeatureViewModel.Clone(IDBPFPackage package, String hash, IEnumerable`1 selected_prototypes)

at S4Studio.Shared.FeatureViewModel.<>c__DisplayClass28_0.<CreateItem>b__0()

at System.Threading.Tasks.Task.InnerInvoke()

at System.Threading.Tasks.Task.Execute()<---



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Please help me to fix it. I can't find a way anymore