Google Drive File Stream folders are missing
I received the following procedure from Google Cloud Support and it seems to have fixed the problem for me.

Go to Drive File Stream icon on the menu bar &gt; gear icon &gt; Pause Syncing
Then, Drive File Stream &gt; gear icon &gt; Preferences &gt; Disconnect Account
Next, Drive File Stream &gt; gear icon &gt; Quit
Fine the cache folder: Finder &gt; Go menu &gt; Go to Folder &gt; paste ~/Library/Application Support/Google/DriveFS
Delete the folder DriveFS
Drag the app Drive File Stream to the trash
Restart the Mac
Reinstall Drive File Stream
Go to Drive File Stream &gt; gear icon &gt; About, and verify that Version: 41.0.2.0

This worked for me but seems very elaborate. Hopefully they will come up with a better way in the future.