For any issues on the iOS app please try to reinstall the app from your mobile device:
- Check the app for any updates
- Remove the app from your device
- Restart your device
- Reinstall the app on your device
If you continue to have trouble, install any available software updates. If these suggestions do not resolve the issues you encounter, please try accessing the app through a different network or WiFi connection to see if the same issues occur.
For more detailed information please visit the official iPhone support page or the official iPad support page.