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After an apple security update this morning, neither my iPhone or my MacBook can sign on to the household’s Wi-Fi. I am getting “invalid password” message. My Amazon Alexis is still connected. Do I need to change the passcode/password and how do I do that. I have a SB8200 modem with Linksys router. 

  1. the SB8200 isn’t a router. It has no wifi
  2. if you needed help with the router, you’d have to check with linksys, not arris
  3. Try going into your apple and forgetting the network and reconnecting. 
  4. of if the issue cropped up after an update, check with apple.