I have the same problem now. All cameras are out. No TACC, no autopilot, no advanced safety assistance features. Also, GPS is non-functional, so navigation does not work. Basically, my two-month-old MYLR is now a 1980s electric car with comfortable seats and good air conditioning.
I have tried re-booting, both the cold and warm reboot. I tried the shut down the car and wait 2-4 minutes, and it was not successful. Then I tried Factory Reset. Well, that was interesting. Of course, nothing happened as to the no-camera issue, but my car's location, which was stuck at my residence moved to Tesla HQ.
Well, I tried to make an appointment at the service center. The next available appointment is three weeks out at the third closest service center one hour away (on a good day, no traffic, yes >60 miles). The next available appointment at the closest SC is six weeks out. geez.