What if the setup of the sensor is wrong (connecting FU20 and it does not see it or incorrect)?

Technically it is possible that when connecting a sensor to a powered adapter that one of the pins on the VP connector connects sooner than others.
The first step is to separate the sensor and adapter and put them back together again.
If that does not work then power down the SA11, connect the sensor and then power it up again.
The SA11 cannot be damaged.