Cannot import QtAudioEngine

I'm trying to follow the documentation:
http://doc.qt.io/qt-5/qtaudioengine-qmlmodule.html

In my project file I have:

QT += gui widgets qml quick xml sql multimedia

When I try to import QtAudioEngine 1.0 in my Main.qml it's just underlined in Qt Creator and when I try to run my app on desktop I get this:

qrc:///Main.qml:4:1: module "QtAudioEngine" is not installed

Why is it not installed? This is the "official" Qt 5.5 SDK.

Otherwise my application is working fine and it can import e.g. QtQuick 2.5

Also when I try to run the AudioEngine example app in Qt Creator, it just displays a dialog that says "Cannot find the executable, please specify one."