3rs Feb 2022 -Product activation failed again!! App was working fine. My soundbar has now disappeared. Attempted to reconnect and now get the above. Re-installed app, rebooted phone and router, disabled firewall on the router, without joy. Searches suggest a factory reset. My concern with this is, if I do, it won't reconnect and and i lose my existing connections to surround speakers. Gave one star because zero is not an option. Full factory reset worked. 2nd time I've had to do this.