Using the Grid's addRow method throws an error

[martintabakov]

Bug report

Calling the Grid's addRow method throws an error.

Regression introduced with version 2025.3.812

Reproduction of the problem

1. Open the Dojo - https://dojo.telerik.com/bkGNMOMW/4
2. Click the Add a new row button

Current behavior

An error is thrown after adding the first row

Expected/desired behavior

No errors should be thrown

Environment

• Kendo UI version: 2025.3.825
• Browser: [all ]