If you have selected and added Amazon Alexa to your Sonos speaker, the voice assistant should be able to play music on Spotify and perform other tasks for you, just by asking with your voice.
But if you have come across an error where Alexa will reply, "I'm sorry the device is disconnected" when you ask it to play Spotify music, for example, on your Sonos Bow, here's how to fix it.
First, navigate to alexa.amazon.ca (better to do this on your Mac or PC desktop browser) and log in, then select Skills in the sidebar, search Sonos and then click "Disable Skill".
Then re-enable the Sonos Skill by clicking "Enable" and following the sign-in instructions.
Once you've done these steps, asking Alexa to play music on your Sonos speaker should work again, as the devices in question will...