Progress® Telerik® UI for ASP.NET AJAX Feedback Portal
Back to Feed
Request a Feature Report a Bug
Completed
Last Updated: 17 Feb 2026 14:10 by ADMIN
Release 2026 Q1 SP1
Attila Antal
Created on: 16 Feb 2026 10:36
Category: HtmlChart
Type: Bug Report
0
Uncaught TypeError: Cannot read properties of undefined (reading 'toLowerCase')
The issue can be observed in the following demo: https://demos.telerik.com/aspnet-ajax/htmlchart/examples/databinding/clientdatasource/defaultcs.aspx 
1 comment
ADMIN
Rumen
Posted on: 17 Feb 2026 14:10
Update: The error is caused by the 2026 Q1 jQuery encapsulation change, the fix is already applied internally (in source), and is planned for the upcoming service pack, with the exact release date still being finalized.
Create an account Log In
View
Type
Status
Category