I'm trying to use the Companion app to edit an Excel (xlsx) file. I click the link to my attachment; the preview loads ok; and the Edit-With menu shows Edit with Excel.
However when I click the Edit with Excel link, an HTML page is downloaded instead of my attachment. The Companion app launches Excel, but Excel balks at the unexpected file content.
I tracked the downloaded file to my .atlassian.companion folder to view the file content. The HTML appears to be HTML for the Confluence login page.
Any suggestions?