I can no longer connect to my Wi-Fi network

First thing I'd try is to reboot both my router and MacBook Air, then see if I can connect.

If that doesn't change things, try running Wireless Diagnostics by holding down the Option key while clicking on the WiFi icon in your Mac's menu bar. Use Wireless Diagnostics on your Mac - Apple Support

(All the above is assuming you're using the correct WiFi password, BTW).

IndyMD wrote:

Thank you for that suggestion. Restarting the MAC Air and the router worked!

Good. Check the Wi-Fi router firmware too, and apply the most recent available.

IndyMD wrote:

Thank you for that suggestion. Restarting the MAC Air and the router worked!

Glad you're back up and running!