Thanks Lucas.
As per your suggestion we tried to build and execute the OpenMobileScenePackage from github site esri/arcgis-runtime-samples-qt/ArcGISRuntimeSDKQt_CppSamples/Scenes/ after installing Runtime 100.5.
It would build correctly but wont execute. Throwing the following runtime error:
QML debugging is enabled. Only use this in a safe environment.
14:56:14: The program has unexpectedly finished.
14:56:14: The process was ended forcefully.
I tried to debug this and it would point me at the following line in main.cpp:
QGuiApplication app(argc, argv);
Can you suggest a solution?