IE11 errors

Using Simple Sidebar Navigation plugin with Vantage theme and SiteOrigin’s Page Builder is causing following errors: (1) after defining navigation menu Done button is not working and (2) Duplicate and Delete actions inside Page Builder row/column container is not working (although Edit action is working and launches Simple Sidebar Navigation plugin definition form). I’m using IE11 on Windows 8.1.

https://ww.wp.xz.cn/plugins/simple-sidebar-navigation/