Resolving Telerik UI for Blazor NuGet Restore Failures Due to Missing Dependencies

Updated on Oct 28, 2026

Environment

The issue applies to the following product versions:

Version	Product
2026.1.210	Telerik Document Processing
13.1.0 (Trial)	Telerik.UI.for.Blazor

Author: Desislava Yordanova.

Description

With an active Blazor trial license, a restore of the Telerik.UI.for.Blazor package may fail because Telerik Document Processing dependencies are missing. Examples include Telerik.Documents.Spreadsheet, Telerik.Documents.SpreadsheetStreaming, and Telerik.Zip.

Solution

Activate a trial for DevCraft. This enables the Document Processing Downloads section in your Telerik account.

Alternatively, instead of using the NuGet packages, download the zip (for example, telerik.ui.for.blazor.13.1.0.zip) from your Telerik account:

The ZIP archive contains all necessary Telerik Document Processing assemblies:

To ensure that the Telerik NuGet server is set up correctly on your machine, follow the steps:

1. Generate a new NuGet application programming interface (API) key from your Telerik account. Use this key instead of a password to authenticate with the trial account:

   

2. Configure the Telerik NuGet server as a package source in Visual Studio:

   

3. Delete any existing package sources that contain Telerik NuGet packages. Add a new package source and enter https://nuget.telerik.com/v3/index.json in the Source field:

   

4. Specify the credentials in the NuGet configuration file. Replace Your API KEY in the following example with your generated API key:

   xml

   <?xml version="1.0" encoding="utf-8"?>
   <configuration>
       <packageSources>
           <clear />
           <add key="nuget.org" value="https://api.nuget.org/v3/index.json" />
           <add key="TelerikNuGetServer" value="https://nuget.telerik.com/v3/index.json" />
       </packageSources>
       <packageSourceCredentials>
           <TelerikNuGetServer>
               <add key="Username" value="api-key" />
               <add key="ClearTextPassword" value="Your API KEY" />
           </TelerikNuGetServer>
       </packageSourceCredentials>
   </configuration>

This ensures that you have added the Telerik NuGet feed as a package source associated with your trial license.

If you previously stored credentials for the Telerik NuGet server, reset them to authenticate with your new API key. Remove the saved credentials in the Windows Credential Manager. These credentials appear as nuget.telerik.com or VSCredentials_nuget.telerik.com entries.

See Also

• Troubleshooting Telerik NuGet Feed