This likely means that your sensor is in its start-up period and is unable to provide a glucose reading until the start-up period has completed.
Please check your sensor again after the duration specified on the screen.
If the “Sensor ready in x minutes” message persists beyond the start-up period complete the convenient online sensor support request form, or contact Customer Care Customer Care which is available at 1-855-632-8658 7 days a week from 8AM to 8PM Eastern Time; excluding holidays.