Watch 6: Gmail app requires re-authentication?

[jeffmoo]

On my new Watch 6, the apps for Google Calendar and Google Contacts open with their content.

But whenever I tap on the app Gmail, it shows the message "Authentication is required. You need to sign into your Google account", but the "Re-authenticate" button below that does nothing.

Google Play Services in my Android phone has all the permissions.

So how would I use Gmail on my watch?

Thanks

[me66]

My main email account has a Gmail backbone, and I also have an @gmail account. I removed the main email and added the @gmail account, and the notification went away.  As soon as I tried to swap them, the notification returned immediately.  This is a new thing with both the Galaxy Watch 6 and the latest update.  Google is quickly becoming more and more difficult for users because of ***** like this. 

[RAM1969]

Same here Not WORKING...

[FredDMY]

have you tried this ?
It worked for me