STEPS TO REPRODUCE
Preconditions: The XWiki instance must have Office Server configured and started.
- Start XWiki in IE11/ Edge browser
- Edit a page with CKEditor
- Click on 'Import Office File' button
- Click 'Browse' and select an Office document
- Click 'Import'
The Office document is imported into the page.
The 'Import Office File' button doesn't do anything when clicked, so the Office document cannot be imported into the page.
The issue can be reproduced on IE11 and Edge browsers, on Chrome and Firefox the button works.
The issue was initially reproduced by @Alexandra Ifrim.