When setting the value for the rich text editor, if the object value is null, it blows up. I have to check if the value is null and if so, set it to an empty string. 
var propValue = linkData[propertyName];
                        var editor = $(this).data("kendoEditor");
                        if (propValue) {
                            editor.value(propValue);
                        } else {
                            // clear value
                            editor.value( '' );
                        }