qt.WebEngineTransport not available anymore?

[dominator]

I`ve updated to Qt 5.7 and now my Javascript API with QtWebEngine is not working anymore

Uncaught ReferenceError: qt is not defined

Any ideas?

[Zigger]

I have the same problem. No ideas, how to use it now.

[dalamber]

I believe this one is the reason - https://bugreports.qt.io/browse/QTBUG-53411
Trying to figure out how to make this work ... Previously I worked only with 5.5/Webkit - now I really need Chromium and can't make it work :(