I had the same issue ... and found the following answer, which worked for me, via Google:
"When the file shows at the bottom of your screen, please right click into Properties & under security it will say security comes from a different computer do you want to unblock after ticking yes, the document should then be viewable in the correct format.
If the file is not showing at the bottom of the screen, you may be required to save it to your computer and when you can see the file to right, click on the icon and select properties and proceed as above."
This is a good solution. I was opening with browser or Word and then copying into Excel, this is better.