After disconnecting the Walkman player and the Bluetooth audio device, I cannot reconnect them.

If you cannot reconnect the Walkman player with the Bluetooth audio device, follow these steps on the Walkman player to turn the Bluetooth setting off and then on again.

1. On the Home screen, swipe down on the status bar twice or, alternatively, swipe down on the status bar with 2 fingers.
2. On the Quick Settings panel, tap the Bluetooth icon and then switch the function on or off.