Thanks for reaching out and welcome to the Bose Community Forums.
I am sorry that you are having this issue and would love to assist you.
To start with, please can I confirm:
Are you trying to connect via Wifi or Ethernet cable?
Have you changed your router password or router recently?
Have you had any power cuts or added any new wifi products into your home?
I look forward to your response.
Vicky W - Community Support
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