Camera is not ready

Guys I'm super frustrated right now my camera app start to malfunction today it keep popping a message of "camera is not ready please retry later" and the camera wouldn't flip when I try to take a selfie.
I tried restarting the phone even reach as far as resetting my phone still nothing solve the problem even when I'm able to use the camera with 3rd party app the image is upside down please help me I don't wanna get a new phone.
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Did you try calibrating it in settings?
How to calibrate it I tried nearly everything
I don't want to get a new phone because of the camera
It's in settings under advanced -> Flip camera features -> Camera retraction -> calibrate camera angle
Thanks for it advice but the camera simply won't launch I can't even open or use the camera gonna get a Zenfone 8 tomorrow