I'm in the midst of following this tutorial https://developers.sap.com/tutorials/cp-mobile-dev-kit-build-client.html
MDK client was created successfully. However, when running the MDK client either in device or emulator, I found below error :
An uncaught Exception occurred on "main" thread.
Unable to create application sap.mdkclient.MDKAndroidApplication: com.tns.NativeScriptException: Error calling module function
Error calling module function
Error calling module function
TypeError: Cannot read property 'ui' of undefined
File: (file:///data/data/com.sap.mdk.demo/files/app/tns_modules/mdk-sap/FormCell/ActivityHandler/ActivityHandler.js:15:48)

Please advise if I've missed any steps while building the MDK SDK. Thank you.
Regards,
Idi