Error message. Any help is much appreciated

Hi everyone. I have spent the last hour browsing through the forums, trying to fix the following error to no avail. My path files are correct (I hope) (game is linked to the The Sims 4 folder (not Game, not Bin, just Sims 4) and the documents path is documents/EA/TheSims4 (abbreviated folder names). My only antivirus is Windows Defender and i added The Sims 4 Studio folder to its exceptions and restarted my computer. I run S4S as administrator.

The Sims 4 Studio - Version 3.1.5.0

System.AggregateException: One or more errors occurred. ---> System.ArgumentNullException: Value cannot be null.

Parameter name: path1

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

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

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

at S4Studio.Shared.AppModel.DoInit()

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

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

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

---> (Inner Exception #0) System.ArgumentNullException: Value cannot be null.

Parameter name: path1

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

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

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

at S4Studio.Shared.AppModel.DoInit()

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

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



I have tried uninstalling and reinstalling S4S, but the same error message appears.
I'd really appreciate any help and suggestions.
Have a great day.