I get warning:
C:/ncs_proj/samples_for_nrf_connect_sdk-main/bootloader_samples/keys_and_signatures/mcuboot_smp_custom_key/build/mcuboot/zephyr/misc/generated/extra_kconfig_options.conf:2: warning: malformed string literal in assignment to BOOT_SIGNATURE_KEY_FILE (defined at C:/ncs/v2.2.0/nrf/modules/mcuboot/boot/zephyr/Kconfig:58, C:/ncs/v2.2.0/bootloader/mcuboot/boot/zephyr/Kconfig:131, C:/ncs/v2.2.0/nrf/modules/mcuboot/Kconfig:3). Assignment ignored.
https://github.com/hellesvik-nordic/samples_for_nrf_connect_sdk/blob/56e9490fcab9a5b6cdd6f289cdf0a5ea43cb97ba/bootloader_samples/keys_and_signatures/mcuboot_smp_custom_key/CMakeLists.txt#L5
I get warning: C:/ncs_proj/samples_for_nrf_connect_sdk-main/bootloader_samples/keys_and_signatures/mcuboot_smp_custom_key/build/mcuboot/zephyr/misc/generated/extra_kconfig_options.conf:2: warning: malformed string literal in assignment to BOOT_SIGNATURE_KEY_FILE (defined at C:/ncs/v2.2.0/nrf/modules/mcuboot/boot/zephyr/Kconfig:58, C:/ncs/v2.2.0/bootloader/mcuboot/boot/zephyr/Kconfig:131, C:/ncs/v2.2.0/nrf/modules/mcuboot/Kconfig:3). Assignment ignored.
error: Aborting due to Kconfig warnings