Cannot launch Comsol 5.6 (unexpected error)

  comsol, windows

After installing Comsol 5.6 on Windows 10 build 20H2, when I try to launch it I keep getting an error saying "an unexpected error occured. see the end of log file for details"

the log file lists:

2020-11-27T14:57:17.100-05:00 Using locale: en_US
2020-11-27T14:57:17.283-05:00 Provide value on 'System.Windows.Baml2006.TypeConverterMarkupExtension' threw an exception.
2020-11-27T14:57:17.303-05:00    at System.Windows.Markup.XamlReader.RewrapException(Exception e, IXamlLineInfo lineInfo, Uri baseUri)
   at System.Windows.Markup.WpfXamlLoader.Load(XamlReader xamlReader, IXamlObjectWriterFactory writerFactory, Boolean skipJournaledProperties, Object rootObject, XamlObjectWriterSettings settings, Uri baseUri)
   at System.Windows.Markup.WpfXamlLoader.LoadBaml(XamlReader xamlReader, Boolean skipJournaledProperties, Object rootObject, XamlAccessLevel accessLevel, Uri baseUri)
   at System.Windows.Markup.XamlReader.LoadBaml(Stream stream, ParserContext parserContext, Object parent, Boolean closeStream)
   at ComsolDesktop.ControlsImpl.MainRibbonWindow..ctor()
   at ComsolDesktop.ControlsImpl.MainWindowView.CreateMainWindowView(MainWindow mainWindow, Boolean shareWithPrimary)
   at ComsolDesktop.App.OnStartup(StartupEventArgs e)
   at System.Windows.Application.<.ctor>b__1_0(Object unused)
   at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
   at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Int32 numArgs, Delegate catchHandler)

I can’t really understand what is going on here. searched internet with no luck. Has anyone encountered an error like this before?

Source: Windows Questions

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