Google Home Mini No Longer Connecting

Thank you for your replies.  I did not change any settings, but rebooted because I received an email from Cox stating, "Faster internet is now on us. Just give us a few minutes and we’ll get your Cox Preferred Internet going faster—from 150 Mbps to 250 Mbps. That’s an increase of more than 60% download speed at no cost to you. All you have to do is reset your modem."  That is when my problem started with the Google Home Minis no longer staying connected.