Hi I have the same issue with Telerik.Documents.Core.

 

Unable to find package Telerik.Documents.Core with version (= 2026.1.402)
  - Found 21 version(s) in telerik [ Nearest version: 2024.1.124 ]
  - Versions from C:\Program Files\dotnet\library-packs were not considered
  - Versions from nuget.org were not considered

 

I'm using UI Blazor why the trial not allows to download the Documents Core? 

 

Hi,

Thanks for updating the trial configuration on your end, appreciate taking a look at it.

I’ve just retested after your change, and I can now see additional package availability, so it looks like something did update on the account side. However, the restore issue is still occurring across all versions I tried.

I tested the following versions:

• 13.1.0

• 13.0.0

• 12.3.0

In all cases, the restore fails with the same error:

Install failed (project: BlazorApp, package: Telerik.UI.for.Blazor v13.1.0)
Package restore failed. Rolling back package changes for 'BlazorApp'.
Unable to find package Telerik.Documents.Core. No packages exist with this id in source(s): nuget.org, TelerikOnlineFeed


Install failed (project: BlazorApp, package: Telerik.UI.for.Blazor v13.0.0)
Package restore failed. Rolling back package changes for 'BlazorApp'.
Unable to find package Telerik.Documents.Core. No packages exist with this id in source(s): nuget.org, TelerikOnlineFeed


Install failed (project: BlazorApp, package: Telerik.UI.for.Blazor v12.3.0)
Package restore failed. Rolling back package changes for 'BlazorApp'.
Unable to find package Telerik.Documents.Core. No packages ... nce the package directly from the project to select a different version.
BlazorApp -> Telerik.UI.for.Blazor 12.3.0 -> Telerik.Documents.Spreadsheet 2025.4.1319 -> Telerik.Licensing (>= 1.6.36 && < 2.0.0)
BlazorApp -> Telerik.UI.for.Blazor 12.3.0 -> Telerik.Licensing (>= 1.6.35 && < 2.0.0

This still appears to be due to Telerik.Documents.Core not being available on the feed, even though it is required as a transitive dependency.

Could you please confirm whether Telerik.Documents.Core is currently published and accessible for my account?

I'm going to give Telerik DevCraft Ultimate a go!

Thanks again.

Thank you for the update and for confirming that Telerik.Documents.Core is expected to appear as a standalone package on the feed, that is helpful context.

To answer your question: I only have an active trial for Telerik UI for Blazor, not for UI for ASP.NET Core or DevCraft Ultimate. Starting a separate trial just to unblock a restore issue is not something I can do right now.

Could you please clarify:

1. Is my existing Blazor trial affected by the issue you mentioned (i.e. existing trials were not fixed, only new ones)? If so, can it be corrected on your end without me needing to start a new trial?

2. Is there a specific version of Telerik.UI.for.Blazor that is confirmed working with the fix applied, so I can pin to that version in my .csproj in the meantime? (I currently have 13.1.0 trail version)

I would rather not switch to a different product trial just to work around a packaging bug. Happy to retest as soon as you can confirm the fix covers existing Blazor trials.

Thank you.

Hi,

Thank you for the update, I saw the note that the issue was marked as fixed. Unfortunately, it is still not resolved on my end.

After seeing the fix announcement, I tried again and the restore still fails with the new error:

  Unable to find package Telerik.Documents.Core. No packages exist with this id in source(s): Feed

  Telerik.UI.for.Blazor 13.1.0
    → Telerik.Documents.Spreadsheet 2026.1.402
        → Telerik.Documents.Core  ← still not resolvable

To confirm this is a feed issue and not a local config issue, I also checked via CI/CD (dotnet restore --locked-mode) and the same failure occurs in a clean pipeline environment with no local cache.

Could you please confirm:
1. Which specific package version the fix was applied to?
2. Whether Telerik.Documents.Core is now expected to appear as a standalone package on the feed, or whether the dependency has been removed from Telerik.UI.for.Blazor's nuspec?

I am happy to retest against a specific version if you can point me to one.

Thank you.