Issues getting nRF9160DK demo working

I have an nRF9160DK that I'm trying to get a demo running per this video:  https://www.youtube.com/watch?v=rMvW3HXLErk&t=832s

The board label says PCA10090, 0.8.5, 2019.6

I follow the instructions in the video and have tried different firmware examples:

From the img_fota_dfu_hex  nrf9160dk_asset_tracker_nbiot_2021-10-20_d29f1dde.hex     I don't get any response from the board after flashing and updating the firmware

From the img_app_bl nrf9160dk_asset_tracker_nbiot_2021-10-20_d29f1dde.hex   I get the following, but all the AT commands time out.  What am I missing here?  I don't see an "images_full" subfolder

SPM: NS image at 0x20200

SPM: NS MSP at 0x20025788

SPM: NS reset vector at 0x2a179

SPM: prepare to jump to Non-Secure image.


*** Booting Zephyr OS build v2.6.99-ncs1  ***


I: Starting bootloader


I: Primary image: magic=unset, swap_type=0x1, copy_done=0x3, image_ok=0x3


I: Secondary image: magic=unset, swap_type=0x1, copy_done=0x3, image_ok=0x3


I: Boot source: none

I: Swap type: none


I: Bootloader chainload address offset: 0x10000

I: Jumping to the first image slot

*** Booting Zephyr OS build v2.6.99-ncs1  ***

Flash regions
	
	
Domain
	
	
Permissions


00 03 0x00000 0x20000 
	
Secure
	
	
rwxl


04 31 0x20000 0x100000 
	
Non-Secure
	
rwxl

Non-secure callable region 0 placed in flash region 3 with size 32.




SRAM region
	
	
Domain
	
	
Permissions

00 07 0x00000 0x10000 
	
Secure
	
	
rwxl


08 31 0x10000 0x40000 
	
Non-Secure
	
rwxl


Peripheral
	
	
Domain
	
	
Status


00 NRF_P0               Non-Secure
	
OK

01 NRF_CLOCK            Non-Secure
	
OK


02 NRF_RTC0             Non-Secure
	
OK


03 NRF_RTC1             Non-Secure
	
OK


04 NRF_NVMC             Non-Secure
	
OK

05 NRF_UARTE1           Non-Secure
	
OK

06 NRF_UARTE2           Secure
	
	
SKIP


07 NRF_TWIM2            Non-Secure
	
OK


08 NRF_SPIM3            Non-Secure
	
OK

09 NRF_TIMER0           Non-Secure
	
OK

10 NRF_TIMER1           Non-Secure
	
OK

11 NRF_TIMER2           Non-Secure
	
OK


12 NRF_SAADC            Non-Secure
	
OK

13 NRF_PWM0             Non-Secure
	
OK


14 NRF_PWM1             Non-Secure
	
OK


15 NRF_PWM2             Non-Secure
	
OK


16 NRF_PWM3             Non-Secure
	
OK


17 NRF_WDT              Non-Secure
	
OK

18 NRF_IPC              Non-Secure
	
OK

19 NRF_VMC              Non-Secure
	
OK

20 NRF_FPU              Non-Secure
	
OK

21 NRF_EGU1             Non-Secure
	
OK


22 NRF_EGU2             Non-Secure
	
OK


23 NRF_DPPIC            Non-Secure
	
OK

24 NRF_REGULATORS       Non-Secure
	
OK

25 NRF_PDM              Non-Secure
	
OK

26 NRF_I2S              Non-Secure
	
OK


27 NRF_GPIOTE1          Non-Secure
	
OK

SPM: NS image at 0x20200

SPM: NS MSP at 0x20025788

SPM: NS reset vector at 0x2a179

SPM: prepare to jump to Non-Secure image.
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