Internet Connection Issue

My MacBook (M1, 2020, Big Sur 11.6.7)was running fine until I did the most recent update yesterday. Now, it won’t connect to Wi-Fi. All other devices and TV are connected so that’s not the problem. I ran the diagnostic and it came up with DNS Resolution Failure. I tried to ping a URL and it said unknown host. I pinged 127.0.0.1and it worked. ( 54 transmitted, 54 received, 0% packet loss) I’ve rebooted in safe mode and tried to connect and still nothing. Any suggestions??