Unable to install nugget packages 8.0.3

The error message indicates that NuGet cannot restore packages because it “could not find a part of the path” to a DLL inside a package. This is a restore/configuration issue rather than a problem specific to version 8.0.3.

Use these steps to fix the restore process:

1. Verify package sources
   • Open a Developer Command Prompt or terminal in the solution folder.
   • Run:

          dotnet nuget list source
     

   • If no sources are listed, or the expected feed (for example, nuget.org or your internal feed) is missing, add it back in your NuGet configuration.
   • Alternatively, create a new NuGet.Config at the repository level:

          dotnet new nugetconfig
     

     Then add the correct package source(s) to that file.
2. Check that the dependency package exists and supports the project’s target framework
   • Open the project file (.csproj) and find the package reference that depends on Microsoft.Identity.ServiceEssentials.Modules.SettingBasedTokenRevocation.
   • Confirm that the package version you are using exists on your configured sources and that it supports the project’s target framework (for example, netstandard2.0, net6.0, etc.). If not, change to a compatible version.
3. Clear and re‑restore packages
   • Close Visual Studio.
   • Delete the packages folder under the solution (if using packages.config) or delete the obj and bin folders (for SDK‑style projects).
   • Reopen the solution and run a full restore (for example, dotnet restore or Visual Studio’s “Restore” button).

If restore still fails and the missing DLL is part of a third‑party package, the package itself may be incorrectly authored (for example, containing invalid or unsafe paths). In that case, contact the package owner to correct the package, similar to how circular or unsafe package contents must be fixed by the package author.

References:

• NuGet Error NU1100
• NuGet Error NU1402
• Known Issues with NuGet