You don’t say what you have tried so here is my suggestion,
Power cycle the zone and see if that helps,
If that doesn’t work, remove the power and then hold the mute/speaker button and re apply power, keep the button pressed until us get a flashing orange light, this will remove the zone, and factory reset it. Once it re-starts and you have a green flashing light, add the
Player back into your system.
I have had a rather annoying couple of hours adding a sub and surrounds to a Beam today and had a few issues with the system not connecting/configuring and pairing. Got there in the end but it was never this temperamental before all this Alexa nonsense.