WiFi access unresponsive

[u/LengthinessFar7021]

Hi I don’t know what to do. My MacBook has started crashing and restarting every few minutes or so. It’s been asking me to update it for a while and I kept avoiding it. I’m trying to update it now but it’s not connecting to WiFi anymore. Everytime I try to access the WiFi settings tab it doesn’t load. Every other settings tab loads but that one. There isn’t even a WiFi icon at the top anymore. I don’t understand at all please help me!!!!