PSA: Google is investigating an issue with Google Drive sharing
Google is investigating an issue for a number of Google Drive users this morning after rolling out an updated UI for the service earlier this year. Google confirmed the problem on its app status website noting that users on the old Google Drive interface are unable to share documents externally.
Google is marking the issue as a service disruption, which means you should still be able to access all of the service’s other features while it looks for a fix. While the new user interface is being rolled out to users already, users still on the old UI have the ability to manually opt-in to the updated Google Drive.