I got an "Upload failed" or "Couldn't save automatically" error while editing an Office file

If you're actively editing a file when someone else deletes it, you'll see a message explaining that you no longer have access to the file, or in some cases, telling you to save a copy of the document so you won't lose work.  

Example of the error message in Word:  

Example of the error message in Word on the web: 

Example of the error message in Visio on the web: 

To save your work, you'll need to save a copy of the file.

If the deletion was a mistake, you can restore the file from the recycle bin of the site or restore from the OneDrive where it was deleted from.