Tobias Zimmergren • 4/12/2021

Fixing NuGet error: Unable to load the service index for source - 401 Unauthorized

This article addresses a common NuGet error in .NET development where 'dotnet restore' or 'dotnet add package' fails with a 401 Unauthorized status, often due to private repository access issues. It provides two practical solutions: creating a nuget.config file to clear package sources and use only the public NuGet feed, and verifying or renewing Personal Access Tokens (PAT) for Azure DevOps private feeds. The article is aimed at developers encountering authentication problems during package restoration, offering quick workarounds to resume development.

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#Nuget #Dotnet #401 Unauthorized