I have uninstalled and reinstalled nRF Connect v3.7.1 - Programmer v1.4.11
nRF9160 plugged into power and blinking - switch aimed at 9160 PROG/DEBUG
No devices available
Error while probing devices: Error occured when get serial numbers. Errorcode: CouldNotCallFunction (0x9) Lowlevel error: INVALID_OPERATION (fffffffe)