nRF5_SDK_12.3.0_d7731ad - BLE Peripheral:Eddystone Beacon Application - cannot connect

I was able to successfully make the BLE Peripheral Eddystone Beacon Application in "nRF5_SDK_12.3.0_d7731ad" in Windows 7 32-bit (pca10040), using GNU Tools ARM Embedded version "7 2018-q2-update".

I used nRFgo Studio-Win32 version 1.21.2 to program my nRF52-DK with the hex file, as well as S132.

I can view the app on "nRF Beacon for Eddystone" on my Moto G5 Android 7 phone which has the latest kernel and patch.  However, I cannot connect to it, the progress wheel keeps rolling.  Referring to:

http://infocenter.nordicsemi.com/index.jsp?topic=%2Fcom.nordic.infocenter.gs%2Fdita%2Fgs%2Fnordic_tools.html&cp=1_1

I am never prompted to "Enter the beacon manufacturer lock code" on the Android app.

When I press button 1 on the DK, LED3 illuminates solid, but when I press Connect on the Android app, LED3 switches off, LED2 illuminates solid and LED1 again starts flashing, as if somehow the DK goes back to Broadcast mode.

Any ideas?  I can successfully launch the Eddystone URL using other Android BLE apps.

Thank you.