I have noticed recently we have an issue with Webgui download. I would like to share the information to you to fix/prevent the issue from happening on your system.
Issue description (in most cases):
1. Start Webgui within Portal and try to download data via List -> Save -> File..
2. Popup is shown. After you click Continue (green tick), nothing happens.
In most case the issue happens after system upgrade and in most case it happens only within portal.
Hope this information helps.