Hello! I see that you're encountering the message "myAir Error noted. No current or historical data." Let's work together to get this sorted out.

To start, could you please tell me:
- Which myAir device or CPAP machine model are you using?
- Have you recently set up your myAir account or made any changes to the device registration?
- Are you connected via Wi-Fi or cellular data on your iPhone?
- Have you used the device normally for at least one full session since noticing the issue?

This information will help me guide you more accurately.

In the meantime, here are some general steps we can start with:

1. Confirm Device Registration:
Make sure the serial number of your myAir device matches the serial number registered in your myAir account. Sometimes the data won’t show if there’s a mismatch.

2. Normal Usage Required:
The app does not show data from a session while it is underway. You need to use your device for a complete session, and then the app will update your data after the session ends.

3. Check Connectivity:
Ensure your iPhone's internet connection is active and stable. Also, confirm that Airplane Mode is turned off and that myAir has permission to use data in the background.

4. Allow Time for Sync:
Data sometimes takes up to 24 hours to update fully in the app after use. If you’ve just started or re-registered the device, please wait and check again later.

5. Re-Add Device:
Logging into the myAir web app and re-adding your device’s serial number can sometimes resolve sync issues.

If these steps don't resolve the problem, we can explore further advanced troubleshooting based on your feedback.

Does this make sense so far? Could you share more details on your device and usage?