Keil can't build secure_bootloader project

[snowuyl]

I would like to using Keil to build secure_bootloader project for changing NRF_DFU_BLE_REQUIRES_BONDS from 0 to 1. But Keil failed to build. Please refer to snapshot of Keil.

[snowuyl]

Which micro-ecc should I use?

nRF5_SDK_16.0.0_y\external\micro-ecc

github.com/.../micro-ecc