To resolve the issue of the Oticon Companion app not being able to connect, follow these steps:

1. Check Bluetooth Settings: Ensure that Bluetooth is enabled on your smartphone or tablet. You can do this by going to the Bluetooth settings and confirming that it is turned on.

2. Restart the App: Close the Oticon Companion app completely and then restart it. This can help clear any temporary glitches.

3. Reconnect to Hearing Aids:
- Open the Oticon Companion app.
- Go to the pairing section which may vary depending on your model to try reconnecting to your hearing aids.
- If prompted, put your hearing aids in pairing mode.

4. Restart Your Device: Sometimes a simple restart of your smartphone or tablet can resolve connectivity issues.

5. Update App and Firmware:
- Check for any available updates for the Oticon Companion app in your device's app store. Updating the app can fix known issues.
- Ensure that your hearing aids have the latest firmware installed. You may need to check this via another app or the Oticon support website.

6. Check Hearing Aids’ Battery: Make sure the batteries in your hearing aids are charged or replaced if needed.

7. Distance and Interference: Ensure you are close enough to your hearing aids when trying to connect and eliminate potential interference from other electronic devices.

8. Factory Reset the Hearing Aids (as a last resort):
- Refer to the manual of your hearing aids for instructions on how to perform a factory reset.
- After resetting, attempt to pair again with the Oticon Companion app.

9. Seek Support: If the above steps do not resolve the issue, consult the Oticon support team for further assistance.

Following these steps should help you connect the Oticon Companion app successfully. If problems persist, reaching out to Oticon’s customer support can provide tailored assistance.