NRF5 SDK 12.2.0 BLE Peripheral app.
Before open Keil Project file, create Symlink directory for NRF5 SDK 12.
Download SDK from here : https://developer.nordicsemi.com/ SDK_v12.2.0 Link : https://developer.nordicsemi.com/nRF5_SDK/nRF5_SDK_v12.x.x/nRF5_SDK_12.2.0_f012efa.zip
mklink /d sdk_root <YOUR_SDK_12_PATH>
:: Run in Adminstrator Mode!
ln -s <YOUR_SDK_12_PATH> sdk_root