Hi i59bravo,
We're sorry to hear you had trouble checking in to your flight. Mobile Check-in experienced an unplanned outage last night at around the time of your posting. Service has since been restored. This was not an issue with the new Android app and was isolated to Mobile Check-in. We'd love it if you give the app a second try and if you have issues you can always reach out to us at [email protected].
The Air Canada Mobile Team