Fixing Source Link Authentication Failed Error

Question

I have a UWP app that uses the SequenceEquals method in expressions like the following:

currnames.SequenceEqual(newnames)

When debugging my code, putting a breakpoint before this code causes Visual Studio 2019 (16.6.2) to give the following error when I step through the code:

Source Link Authentication Failed

Here are several screenshots:

If I do not include a breakpoint or step through the code (or if I step over this code), the expression is evaluated correctly. Why am I not allowed to step through this code? Thanks.