MissingMethodException yet LinqPad can see the method

I wrote a simple DLL that exposes some public functions for get AWS S3 buckets. It works great on my windows 10 laptop, but not so well on a new Server 2019. On the server 2019, I get a "Method Not Found" error. What really confounds me is that the intellisense picks up the method. Reflection can see the method - but the error happens. Please see screenshot. My imports are just my c# .Net 4.8 DLL and a single namespace "wwcs".

Any thoughts or suggestions would be most appreciated. Thanks!

  • Sean
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