Alexa responds, "Sorry, this device is offline"
This error generally occurs if a product you are trying to control is not connected to your network or if the Amazon account for the Alexa voice assistant is linked to multiple Bose accounts. To resolve this, try the following:
Try streaming an Internet radio station or music service to confirm the product is connected to the Internet.
Try phrasing the voice request differently.
Use typical and common names for your system.
Reset your product.
Determine if the Alexa account is already linked to another Bose account.
If you have created more than one Bose account—or if you have shared your Amazon account with others—check any other Bose accounts that you or others have and remove the Amazon account from any Bose accounts other than your main account.
If you want to share an Amazon account with users on your network (i.e. family members with separate Bose accounts but a shared Amazon account), have one user add the Amazon account and Bose products to their Bose Music account. Then, share the Bose products so other users on the network can use them. For more info, see Turning product sharing on or off.