System.Linq.Enumerable.ToHashSet(System.Collections.Generic.IEnumerable`1<!!0>)

[martin@rootjazz]

You need to have at least 4.8 Microsoft .Net framework.
https://www.google.com/search?q=how+to+ ... +framework

https://dotnet.microsoft.com/en-us/down ... -framework
https://dotnet.microsoft.com/en-us/down ... work/net48


OR, if you make sure your machine is uptodate with all windows update and it should resolve the issue



Regards,
Martin