Error 503 (Service Unavailable) with Telerik NuGet Packages

Environment

Product Version	2025.1.211
Product	Telerik UI for WPF

Description

When attempting to build a project that includes Telerik UI for WPF NuGetPackages, the following error is encountered during package restore process:

Response status code does not indicate success: 503 (Service Unavailable). Retrying FindPackagesByIdAsyncCore for Source https://nuget.telerik.com/nuget/FindPackagesById()

The error message occurs because the package restore process tries to access to now discounted Telerik NuGet feed version 2.0. This can be indicated by the URL in the message. The new URL is https://nuget.telerik.com/v3/index.json

To resolve this, make sure to adjust the NuGet package source to point to the new URL: https://nuget.telerik.com/v3/index.json

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