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

## 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](https://www.telerik.com/blogs/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](https://www.telerik.com/download). 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:

<img style="border: 1px solid gray;" src="/document-processing-libraries/documentation/assets/4afa515f2c2d817cc1a360cffc06769d/blazor-zip.png" alt="Telerik UI for Blazor downloads page with the ZIP archive listed under Other Setup Files" />

The ZIP archive contains all necessary Telerik Document Processing assemblies:

<img style="border: 1px solid gray;" src="/document-processing-libraries/documentation/assets/6a6c7bfeda80ba4727ec147b743fff42/all-assemblies.png" alt="Extracted archive with the Telerik Document Processing assembly files" />

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:

    <img style="border: 1px solid gray;" src="/document-processing-libraries/documentation/assets/76cfd06d26137f66694f819217129e3e/generate-api-key.png" alt="Telerik account controls for generating a NuGet API key" />

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

    <img style="border: 1px solid gray;" src="/document-processing-libraries/documentation/assets/36f9b42080c5628421839f3ff94f281d/configure-nuget.png" alt="Visual Studio NuGet package source settings" />

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:

    <img style="border: 1px solid gray;" src="/document-processing-libraries/documentation/assets/bd4e4f6f854e2a82bcd411c623633136/add-package-source.png" alt="NuGet package source entry with the Telerik feed address 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.

> note 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](https://support.microsoft.com/en-us/windows/credential-manager-in-windows-1b5c916a-6a16-889f-8581-fc16e8165ac0). These credentials appear as `nuget.telerik.com` or `VSCredentials_nuget.telerik.com` entries.

## See Also

* [Troubleshooting Telerik NuGet Feed](https://www.telerik.com/blazor-ui/documentation/troubleshooting/nuget-feed#unable-to-find-package)