I set up sonos Arc and Sub + one*2 last year.

I tried reconnect Sonos One last week, then the App said I need to update. But it fails many times and I reset Arc and Sub.

The Arc works. It keeps failing again when I tried to connect Sub.

I tried reset the Sub, rebooting my router and connect the ethernet cable but the result is same.

Does anyone know how to solve this?

error code 30 and 1000