hihih
I have DK9160 and THINGY91, which I bought 2 years ago.
I want to use them now.

I got the output:
***** Booting Zephyr OS build v1.14.99-ncs2-495-ga8933a2ead01 *****
[00:00:00.006,469] [1B][0m<inf> mcuboot: Starting bootloader[1B][0m
[00:00:00.014,862] [1B][0m<inf> mcuboot: Primary image: magic=unset, copy_done=0x3, image_ok=0x3[1B][0m
[00:00:00.026,245] [1B][0m<inf> mcuboot: Scratch: magic=unset, copy_done=0x50, image_ok=0x3[1B][0m
[00:00:00.037,017] [1B][0m<inf> mcuboot: Boot source: primary slot[1B][0m
[00:00:00.048,278] [1B][0m<inf> mcuboot: Swap type: none[1B][0m
[00:00:00.400,421] [1B][1;31m<err> mcuboot: Image in the primary slot is not valid![1B][0m
[00:00:00.410,278] [1B][1;31m<err> mcuboot: Unable to find bootable image[1B][0m
I don't know how to fix this problem. could you plz help me.
Tusen hjertelig takk
Mvh
Hoang