Upgrade Troubleshooting
The new and improved versions of the UI components sometimes bring changes that require you to take additional steps during or after the upgrade.
This document describes how to troubleshoot your application and what to be wary of when upgrading to new Telerik UI for ASP.NET MVC releases.
2023 Yearly Releases
The issues listed below are common when upgrading to Telerik UI for ASP.NET MVC versions released in 2023. Follow the link next to each problem to find the solution.
- A
License Activation failedwarning appears in the browser's console, as a banner, and as a watermark for the components—The solution is to generate a license file that will remove the warning from the application. - The Kendo CDN links for the CSS and JS files are obsolete and you cannot access these files on
kendo.cdn.telerik.com—These URLs have changed due to a shift in the naming convention and the solution is to use the new URLs. - The files for the Less themes are missing after upgrading to a new Telerik UI for ASP.NET MVC version—The Telerik UI for ASP.NET MVC components no longer support Less themes and Telerik recommends migrating to Sass-based themes.
- Font icons are missing and their classes are not applied—Starting with version
R3 2023, the Telerik UI for ASP.NET MVC UI components use SVG icons by default. Nevertheless, you can revert to font icons. - The previously included jQuery CDN from Kendo is now missing with new versions—Starting with version
R3 2023, the Telerik UI for ASP.NET MVC library has discontinued shipment of the jQuery library. - The previously included JSZip CDN file is not available after upgrading to a new Telerik UI for ASP.NET MVC version—Starting with version
Q1 2024, the JSZip library is no longer shipped with the Kendo UI Distributions. To still use the JSZip library, replace the CDN reference with official distribution channels such asunpkgorCloudflare.