You may be using an old version of Celo.
- Update the app using the App Store (on iPhone) or Google Play Store (on Android) and retry.
- If problems persist, delete the app and reinstall it on your phone.
Your phone may not have the latest software installed.
Ensure that you have the latest software installed on your phone. See this article for the most up-to-date requirements.
If you still experience any issues, please contact us at firstname.lastname@example.org and we will assist you.