Problem: Unable to resolve dependencies of NuGet packages

When you upgrade the site by installing Telerik.Sitefinity.All NuGet package, Visual Studio throws the following error:

Unable to resolve dependencies. 'Progress.Sitefinity.Authentication 10.0.6421' is not compatible with 'Telerik.Sitefinity.Core 10.1.6523
Unable to resolve dependency 'Telerik.Sitefinity.AmazonCloudSearch'. Source(s) used: 'Sitefinity NuGet Server', '', 'Microsoft Visual Studio Offline Packages.

The cause for this error is that NuGet cache conflicts with the build of the site. 


To resolve the problem, perform the following:

  1. Clear the NuGet cache files.
    You do this in the following way:
    1. In the toolbar of Visual Studio, navigate to Tools » NuGet Package Manager » Package Manager Settings.
    2. In the left pane, navigate to NuGet Package Manager » General.
    3. Click Clear All NuGet Cache(s).
  2. Confirm that the Sitefinity NuGet Server ( is configured in Visual Studio.
    To do this, navigate to Tools » NuGet Package Manager » Package Manager Settings » Package Sources.
  3. Delete all packages from the packages folder, located in your project's folder.
  4. Reinstall Telerik.Sitefinity.All to the desired version.
  5. Rebuild the project.

Increase your Sitefinity skills by signing up for our free trainings. Get Sitefinity-certified at Progress Education Community to boost your credentials.

Get started with Integration Hub | Sitefinity Cloud | Sitefinity SaaS

This free lesson teaches administrators, marketers, and other business professionals how to use the Integration hub service to create automated workflows between Sitefinity and other business systems.

Web Security for Sitefinity Administrators

This free lesson teaches administrators the basics about protecting yor Sitefinity instance and its sites from external threats. Configure HTTPS, SSL, allow lists for trusted sites, and cookie security, among others.

Foundations of Sitefinity ASP.NET Core Development

The free on-demand video course teaches developers how to use Sitefinity .NET Core and leverage its decoupled architecture and new way of coding against the platform.

Was this article helpful?