To reproduce :
go to official dojo https://dojo.telerik.com/PfhfyBzh

select all text (ctrl+A) (or select text with image at the same time with mouse)

Start dragging the selection

---> the error occurs (check console devTools)

Uncaught TypeError: Cannot read properties of undefined (reading '_destroyResizeHandles')

The error occurs here :

let fe = u.extend({
            create: function(e) {
                let t = this;
                a(e.body).on(`dragstart` + S, function() {
                    var t = x.nodes(e.getRange())
                      , n = !1;
                    t.forEach(function(e) {
                        e.nodeName === `IMG` && (n = !0)
                    }),
                    n && t.length > 1 && e.elementResizing._destroyResizeHandles()

your algorithm find one image in the selection and assume we are resizing and try to call "_destroyResizeHandles"

I think you should test before calling this method so it should be :

n && t.length > 1 && e.elementResizing && e.elementResizing._destroyResizeHandles()