确实模糊不清，但是我发现了可以解决问题的方法。我在整个C：驱动器中搜索了Nuget.Config，并在％appdata％\Nuget\Nuget.config中找到了一个。我删除了它，构建成功进行了。 Nuget.config已还原为解决该问题的一些默认值。我无法解释；只是很高兴它起作用。

Really obscured, but I found something that fixed my problem. I searched for Nuget.Config in the entire C: drive and found one in %appdata%\Nuget\Nuget.config. I removed it and the build went through successfully. The Nuget.config was restored to some default values that fixed the problem. I can't explain it; just glad it worked.