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nRF Connect programmer does not accept board

Fired up nRF Connect v3.6.0 on MacOS

Plugged in new 9160-dk and switched on.

Connected to USB.

Selected board.  Green dot appeared but nothing in the "Device memory layout" square.

Even before selecting binary we get 

```

13:05:52.057
Application data folder: /Users/paul_tanner/Library/Application Support/nrfconnect/pc-nrfconnect-programmer
13:05:52.153
Using nrfjprog library 10.9.0, pc-nrfjprog-js 1.7.3
13:05:53.057
Error while probing devices: Error occured when get serial numbers. Errorcode: CouldNotCallFunction (0x9) Lowlevel error: INVALID_OPERATION (fffffffe)
13:06:04.108
Unsupported device. The detected device could not be recognized as neither JLink device nor Nordic USB device.

```

(Selecting the hex file went OK.)

Anything else I need to do to make this work?

Thx.

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