ERROR in ../../js/webix/webixClass.js 50:11 (Webpack)

Здравствуйте!

При сборке проекта силами webpack’a, при добавлении import { SendServer } from "../../js/webix/sendServer" выскакивает ошибка:

../www-common/www/web/js/webix/webixClass.js 1.97 KiB [built] [code generated] [1 error]

ERROR in ../www-common/www/web/js/webix/webixClass.js 50:11
Module parse failed: Unexpected token (50:11)
You may need an appropriate loader to handle this file type, currently no loaders are configured to process this file. See https://webpack.js.org/concepts#loaders
|      * @param def
|      */
>     proper = (obj = {}, name = "", def="")=>{
|         if (obj.hasOwnProperty(name))
|             this[name] = obj[name]
 @ ../www-common/www/web/js/webix/sendServer.js 5:0-40 23:32-42
 @ ./www/web/js/classAdmission.js 3:0-79
 @ ./www/web/js/admission.js 1:0-49 3:31-45
 @ ./www/web/js/index.js 2:0-39 102:32-41

webpack 5.4.0 compiled with 1 error in 427 ms
[webpack-cli] watching files for updates...

Стоит закомментировать импорт и ошибка исчезает.

Дополнительные файлы можно найти по адресу: ERROR in ../../js/webix/webixClass.js 50:11 (Webpack 5.4.0) - Stack Overflow на русском