Qt5.6 offline: WebEngineCore library not loaded error from WebEngine examples

WebEngine application examples can be compiled with Qt Creator but application output prints following error messages:

QuickNanoBrowser error message:
qml: Render process exited with code 5 (normal exit)
dyld: Library not loaded: @rpath/QtWebEngineCore.framework/Versions/5/QtWebEngineCore
Referenced from: /Users/aksalova/QtE5.6.0-aios-beta-169/5.6/clang_64/lib/QtWebEngineCore.framework/Helpers/QtWebEngineProcess.app/Contents/MacOS/QtWebEngineProcess
Reason: image not found

FancyBrowser error message:
dyld: Library not loaded: @rpath/QtWebEngineCore.framework/Versions/5/QtWebEngineCore
Referenced from: /Users/aksalova/QtE5.6.0-aios-beta-169/5.6/clang_64/lib/QtWebEngineCore.framework/Helpers/QtWebEngineProcess.app/Contents/MacOS/QtWebEngineProcess
Reason: image not found

DemoBrowser has now error message but application window (unsurprisingly) doesn't open at all.