Building example for Android fails on MacOS

Tom asso

Running Qt 5.13.0 on MacOS Sierra (10.12.6).
I've configured Qt for Android development per these instructions,. Trying to build the qmlsurfacelayers project in qtcreator examples, using the android kit armeabi-v7a (Clang Qt 5.13.0 for Android ARMv7). Build fails with following error messages:

Warning: QML import could not be resolved in any of the import paths: QtQuick.Extras.Private.CppUtils
Warning: QML import could not be resolved in any of the import paths: QtQuick.Extras.Private.CppUtils

FAILURE: Build failed with an exception.

* Where:
Build file '/Users/oreilly/Qt/Examples/Qt-5.13.0/datavisualization/build-qmlsurfacelayers-Android_for_armeabi_v7a_Clang_Qt_5_13_0_for_Android_ARMv7-Debug/android-build/build.gradle' line: 17

* What went wrong:
A problem occurred evaluating root project 'android-build'.
> Failed to apply plugin [id 'com.android.application']
   > Could not create an instance of type com.android.build.gradle.internal.dsl.BaseAppModuleExtension_Decorated.
      > Could not create an instance of type com.android.build.gradle.internal.api.DefaultAndroidSourceSet.
         > Uninitialized object exists on backward branch 70
           Exception Details:
             Location:
               com/android/build/gradle/internal/scope/BuildArtifactsHolder.newArtifact(Lcom/android/build/api/artifact/BuildableArtifact;)Lcom/android/build/gradle/internal/scope/BuildArtifactsHolder$BuildableArtifactData; @119: goto
             Reason:
               Error exists in the bytecode
             Bytecode:
               0000000: bb02 0559 2bb9 0208 0100 c000 b82b b902
               0000010: 0c01 0001 b902 1202 0059 1302 14b8 0051
               0000020: c001 734d 3a0d 3a0c 3a0b 2c4e bb01 a659
               0000030: 2c10 0ab8 0177 b701 a7c0 00b8 3a04 2db9
               0000040: 018e 0100 3a05 1905 b901 9401 0099 002d
               0000050: 1905 b901 9801 003a 0619 0419 06c0 00f1
               0000060: 3a07 3a0e 1907 b902 1501 003a 0f19 0e19
               0000070: 0fb9 01ad 0200 57a7 ffcf 1904 c001 af3a
               0000080: 0e19 0b19 0c19 0d19 0eb7 0218 b0       
             Stackmap Table:
               full_frame(@70,{Object[#2],Object[#83],Object[#371],Object[#371],Object[#184],Object[#400],Top,Top,Top,Top,Top,Uninitialized[#0],Uninitialized[#0],Object[#184]},{})
               same_frame(@122)


* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.

* Get more help at https://help.gradle.org

BUILD FAILED in 6s
Building the android package failed!
  -- For more information, run this command with --verbose.
  -- Skipping /Users/oreilly/Qt/5.13.0/android_armv7/plugins/iconengines/libqsvgicon.so. It has unmet dependencies: lib/libQt5Svg.so,lib/libQt5Widgets.so.
  -- Skipping /Users/oreilly/Qt/5.13.0/android_armv7/plugins/imageformats/libqsvg.so. It has unmet dependencies: lib/libQt5Svg.so,lib/libQt5Widgets.so.
09:59:04: The process "/Users/oreilly/Qt/5.13.0/android_armv7/bin/androiddeployqt" exited with code 14.
Error while building/deploying project qmlsurfacelayers (kit: Android for armeabi-v7a (Clang Qt 5.13.0 for Android ARMv7))
When executing step "Build Android APK"
09:59:04: Elapsed time: 00:10.