For more information and steps to try, please see this support article: Error 1000 when updating Sonos
Hi, I wanted to add the last element to my Sonos set (SUB + 2x Era 300), - Arc. I get to the point of updating the software and I get "Error: 1000". And so on. I've already tried factory reset and moving closer to the router. It's always the same. Maybe you have some ideas or similar experiences?