Removing the Kendo License Warning

Updated on Nov 11, 2026

Environment

Product	Telerik UI for ASP.NET Core
Progress Telerik UI for ASP.NET Core version	2022.3.913

Description

After upgrading, there is a warning in the console stating the following:

Razor

 License Activation failed for @progress/kendo-ui
 No license found

A watermark for the component I have been using:

And a banner which indicates that my license is not found:

The image is a an example of the current client-side banner for Telerik UI for ASP.NET Core. Its appearance depends on the version used in your application.

The application seems to be running. How can I remove the warning, watermark, and banner?

Solution

For 2025 Q1 and later, follow License Key Installation. If you have already installed a license key, see License Key Errors for troubleshooting and examples of the current banners and trial notices.

The following script-key instructions apply to the legacy licensing mechanism introduced with R3 2022, for versions earlier than 2025 Q1. To remove the warning in these versions:

• Generate a license file.
• Add the license file after the CDN reference to kendo.all.min.js and kendo.aspnetmvc.min.js.
  Razor

  <script src="https://kendo.cdn.telerik.com/***/kendo.all.min.js"></script>
  <script src="https://kendo.cdn.telerik.com/***/kendo.aspnetmvc.min.js"></script>
  <script src="~/kendo-ui-license.js"></script>
  
  <!-- Rest of the HTML -->

The license file mechanism does not break any builds and does not affect existing applications. It acts as verification when the CDN or NPM distribution channel is utilized for the client-side resources.

See Also

• Upgrade Troubleshooting
• Telerik UI for ASP.NET Core Breaking Changes
• Telerik UI for ASP.NET Core Knowledge Base