This is a minor issue.
Here’s the webpage in question: https://felgo.com/doc/vplay-deployment-other/
And the corresponding section regarding deployment to macOS:
Please see the official Qt macOS deployment guide for more information.
The link leads to http://doc.qt.io/qt-5/osx-deployment.html.
But the link leads to a missing page. Here’s the correct link, I believe: http://doc.qt.io/qt-5/macos-deployment.html