Hi!
Since almost a week, I can’t take any photographs except with selfie camera. When I start the camera, I can’t choose to switch from selfie, that icon is simply missing on the screen.
This happened overnight, I didn’t install anything. Another thread recommended updating to the latest OS version, but I already have this.
Try to #disassemble the camera module and clean the contacts. A missing camera switch button usually indicates that the software believes there is only one hardware camera, because the connection to the second one fails.