Answered
arc ultra and alexa
Cannot get Alexa to play music on my Arc Ultra via voice command
Cannot get Alexa to play music on my Arc Ultra via voice command
I had the same issue yesterday, for me and I hope for you also the solution was only disable the skill of Sonos and after enabled it again and connect your sonos account it alone will connect all your speakers and enable Alexa, but before this step you need to link your account of Alexa in the Sonos app :)
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