Bug report

When kendo.observable is updated based on a selected TreeView node an error VM6996:1 Uncaught SyntaxError: "undefined" is not valid JSON is thrown.

Reproduction of the problem

1. Open the Dojo - https://dojo.telerik.com/CESnRsTi
2. Click on the first button
3. Click in the input filed and type some text
4. Press 'Enter' or click otuside the input to blur

Current behavior

An error Uncaught SyntaxError: "undefined" is not valid JSON is thrown.

Expected/desired behavior

There should be no error and the observable should be updated correctly.

The issue is a regression starting with 2024.3.806

Environment

• Kendo UI version: 2024.3.1015
• Browser: [all ]