"This code does not belong to your account"
The code belongs to another license or the tablet is not the bound one. Use the installation code from your own configuration panel. Flightdemy global admins can access without a binding for support.
I do not see the faults I configured
Or the ones you disabled still appear. Confirm you saved in the Faults tab of the FAP iOS app configuration, not the FAP Trainer one: each app has its own configuration. Open the app with the correct code, because the configuration loads based on the link code. And hard refresh on the tablet: on iPad, clear the site cache from Settings, Safari.
The hardware dot is red
Open the panel by tapping the button and press retry connection. Verify the tablet and the controller are on the same router, and check in the FAP Trainer panel, Hardware, Controller, that the device is active and its last contact is recent.
No sound
Tap the screen once after opening the app, because browsers require a gesture to enable audio, and raise the tablet volume.