Using Debug Now GUI button generates this line in launch.json:
"${workspaceFolder}/nfed/samples/mqtt/build/circuitdojo_feather_nrf9151@2/mcuboot/zephyr/zephyr.elf"
It should be:
${workspaceFolder}/nfed/samples/mqtt/build/circuitdojo_feather_nrf9151@2/mqtt/zephyr/zephyr.elf"
It is a new project copied from nfed/samples/blinky and located at nfed/samples/mqtt.
Unable to see any differences in folder hierarchy between blinky and my new mqtt folder.