Issue: Nuget.Config is corrupted

Issue:  C:\Users\Administrator\AppData\Roaming\NuGet\Nuget.Config is corrupted.
Solution: Edit the Nuget.Config with the following text.

<?xml version="1.0" encoding="utf-8"?>
<configuration>
<packageSources>
<add key="NuGet official package source" value="https://go.microsoft.com/fwlink/?LinkID=230477" />
</packageSources>
<activePackageSource>
<add key="NuGet official package source" value="https://go.microsoft.com/fwlink/?LinkID=230477" />
</activePackageSource>
</configuration>