LP5: Reference assemblies should not be loaded for execution

I have a dll written in .net 4.7.2 that reads the contents of a zip file using the System.IO.Compression namespace with the additional functionality included in System.IO.Compression.FileSystem. This dll works in VS, and it works from a console application that references it. And until today, it worked within LinqPad 5.

But today, I started getting this message when i try to use it:

Could not load file or assembly 'System.IO.Compression, Version=, Culture=neutral, PublicKeyToken=b77a5c561934e089' or one of its dependencies. Reference assemblies should not be loaded for execution. They can only be loaded in the Reflection-only loader context. (Exception from HRESULT: 0x80131058)

The exception is being thrown within my dll, but only if called from LinqPad.

The last change made was this Windows Update:

2020-08 Cumulative Update for Windows 10 Version 1607 for x64-based Systems (KB4571694) installed on 8/15/2020.

Any suggestions?


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