I’ve rebooted My Book Live Duo and regained access via dashboard. Set PC in standby overnight. Turn on PC in the morning and shares are gone. Green LED displaying on drive. Only change is that I swapped out one of the USB drives. My Book Live Duo keeps disconnecting after several hours!
You may refer to the following link: https://support-en.wd.com/app/answers/detail/a_id/24509