To resolve the issue with the O-KAM Pro app not working, please follow these step-by-step troubleshooting guidelines:

1. Restart the App and Device: Exit the O-KAM Pro app completely, then restart your device. Sometimes, simply refreshing the connection can solve the issue.

2. Check App Version: Ensure that you are using the latest version of the O-KAM Pro app. Go to the Google Play Store and check for updates. If an update is available, install it - learn more.

3. Check Internet Connection: Make sure your device has a stable internet connection (Wi-Fi or mobile data). You can test another app or website to confirm your connectivity.

4. Verify Camera Connection: If you experience connection issues specifically with the camera, check:
- Is the SIM card correctly inserted in the O-KAM camera? Open the lid on top of the camera to verify - learn more.
- Ensure the camera is powered on and in range of your Wi-Fi network.

5. Log Back In: Sometimes, logging out and then logging back into the app can re-establish a connection to your camera - learn more.

6. Adjust Device Settings: Go to your device's settings and check the app permissions for O-KAM Pro. Ensure the app has necessary permissions like location and background data.

7. Reset the Camera: If the connectivity issues persist, perform a factory reset on the O-KAM camera according to the manufacturer's instructions. This will eliminate any settings preventing a proper connection.

8. Reinstall the App: If the app still does not work, uninstall the O-KAM Pro app from your device and then reinstall it from the Google Play Store - learn more.

9. Contact Support: If you have tried all the above steps and the app is still not functioning, reach out to O-KAM support for further assistance - learn more.

By following these steps, you should be able to troubleshoot and potentially resolve the issues with the O-KAM Pro app not working.