- Quit all Office Applications
- Click on Finder in the menu bar.
- Choose Go > Go to Folder.
If the ~/Library/Containers/com.Microsoft.OsfWebHost/Data/ folder doesn't exist, check for the following folders and delete the contents of each folder as needed.
~/Library/Containers/com.microsoft.{host}/Data/Library/Caches/
~/Library/Containers/com.microsoft.{host}/Data/Library/Application Support/Microsoft/Office/16.0/Wef/
~/Library/Containers/com.microsoft.Office365ServiceV2/Data/Caches/com.microsoft.Office365ServiceV2/
~/Library/Containers/com.microsoft.Office365ServiceV2/Data/Library/Caches/com.microsoft.Office365ServiceV2/