Bug report

Grid with group paging and server operations enabled throws a JavaScript error when expanding groups. Reported in ticket 1560566.

Reproduction of the problem

1. Run this dojo
2. Follow the steps in this screencast to reproduce the error

Current behavior

A JavaScript error is thrown:

Expected/desired behavior

No error should be thrown group paging should work as expected

Environment

• Kendo UI version: 2022.1.301
• Browser: [all]