Thanks for visiting the community.
My apologies for the late response here. I know how challenging it can be to not have a working device when needed and we'd like to zero in on what's happening to your Google Home/Nest device - is this a first time set up? What part of the setup do you get the 83905 message? Where are you located? What type of network connection do you have (public or private)? Are you using a VPN?
Looking forward to your response.
Just bumping in to make sure that you've seen our responses. I'll be locking this thread if we won't hear back from you again in 24 hrs. Feel free to create a new one if you have more questions or have other concerns in the future.