The problem that was for the most of us lately: "Oculus Software restart required", Sensors cannot track headset when trying to setup the oculus rift s again, Displayport did not registeres, 3 white dots in a black screen when putting the headset on. all of that was my issues until 30 minutes ago!
when trying to setup a new device the message was "Sensors can't track headset" and then you'll try to mess with the cables of the headset.
anyway, STAIGHT TO THE POINT! This will (I hope at least) fix that bug for most of you.
Go to Windows>Settings>Privacy>Camera. If the camera settings is turn on, turn them off. EVERYTHING!
after that check what the software says about it headset. it should say straight away "Sensors can't track headset".
If that is what you got then it's good. Turn on the camera settings and try again the Oculus Software.
That method fixed the problem for me and I hope it will fix your problem as well! if that fixed your problem, Please be sure to write it down here.
If the problem has returned, repeat that process.
Have a good day!