Welcome to the Google Nest Community Forum.
Sorry for the late response here. I know how it feels when you're having issues with your Google Home Mini. A few questions: when did the issue start? How many Google Home/Nest devices do you have? How far is your Home Mini from the router?
Please try these steps below:
Let me know how it goes.
Got it! To eliminate network issues, please try setting up one of your devices using a mobile hotspot. Please note that you will need two mobile devices for this setup (one will serve as a router and the other to be used to set up your Google Home or Mini device).
Glad to hear your issue has been resolved, and everything is working properly from here. With that being the case, I am going to lock the thread at this time. If you have any questions from here, please feel free to create a new post.