Error Message (Can't view CC, Mannequin not showing up)

Sims 4 Studio was working fine until the recent update, now all of a sudden the model isn't showing up and most of my CC won't show up at all and instead I get this message.

The Sims 4 Studio - Version 3.1.3.0

System.ArgumentException: Parameter is not valid.

at System.Drawing.Bitmap..ctor(Int32 width, Int32 height, PixelFormat format)

at System.Drawing.Bitmap..ctor(Int32 width, Int32 height)

at S4Studio.Images.WindowsBitmap.LoadComposite(IEnumerable`1 bmps)

at S4Studio.Shared.ViewModels.CAS.WPFMannequin.BitmapMerge(List`1 ot)

at S4Studio.Shared.ViewModels.CAS.WPFMannequin.Update(CASPartResource casp)

at S4Studio.ViewModels.CAS.CASStandalone.UpdateMannequin()


It also is very slow and constantly showing "Not Responding". I've tried redownloading it several times, but it's not doing much.

UPDATE: Alright, I redownloaded it and now this error message is showing on start up!


The Sims 4 Studio - Version 3.1.3.0

System.AggregateException: One or more errors occurred. ---> S4Studio.Data.IO.Package.PackageLoadException: Failed to load C:\The Sims 4\EP08\ClientFullBuild0.package ---> S4Studio.Data.IO.Package.NotASimsPackageException: Exception of type 'S4Studio.Data.IO.Package.NotASimsPackageException' was thrown.

at S4Studio.Data.IO.Package.DBPFHeader.Read(Stream stream, IReferenceList resources)

at S4Studio.Data.IO.Package.DBPFPackage.ReadIndexTable()

at S4Studio.Data.IO.Package.DBPFPackage..ctor(String filename, Boolean cache, IPackageEntryStorage storage, IPackageResourceCache cache_storage, IPackageCompressor compressor)

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

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) S4Studio.Data.IO.Package.PackageLoadException: Failed to load C:\The Sims 4\EP08\ClientFullBuild0.package ---> S4Studio.Data.IO.Package.NotASimsPackageException: Exception of type 'S4Studio.Data.IO.Package.NotASimsPackageException' was thrown.

at S4Studio.Data.IO.Package.DBPFHeader.Read(Stream stream, IReferenceList resources)

at S4Studio.Data.IO.Package.DBPFPackage.ReadIndexTable()

at S4Studio.Data.IO.Package.DBPFPackage..ctor(String filename, Boolean cache, IPackageEntryStorage storage, IPackageResourceCache cache_storage, IPackageCompressor compressor)

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

at S4Studio.Shared.AppModel.DoInit()

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

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