Anyone has any idea?

These messages aren't critical, you can ignore them. What's important is, that you don't crash the application anymore.

The problem is the same as in your other thread: you need to take care of the destruction order of your qobjects.

Hi. already fixed in https://bugreports.qt.io/browse/QTBUG-46074

resolved !! i've chenged m_pNetworkAccessManager->get(request); by request.setRawHeader("Content-Type", "application/x-www-form-urlencoded"); QByteArray par=""; m_pNetworkAccessManager->post(request,par);

I had the same question as you,I think ,maybe your project is short of the '.js' file. You can add the '.js' file to the project-resource , then have a try. By the way ,In my project , It has the ',js' file,but there is still a quetion. In my projtct,I want load a HTML that use google maps api and show maps offline ,oc course I have doemloaded the map titles .the HTML can work in any browser, such as chrome, IE ,firefox and so on,but the html doesnot work in Qt5.6.0 which I use the QWebEngineWidget class. The error is : js: Uncaught TypeError:google.maps.LatLng is not a function js: Uncaught TypeError:google.maps.MAP is not a function So,this is my question,I haven't solved。

@Hans-Dijkema I have yet to try Qt 5.7 beta, but... it seems to me like you haven't installed QtWebEngine?...

@p3c0 That worked, thanks for your help.

Hi and welcome to devnet, If you can reproduce this easily with a minimal compilable example, you should go to the bug report system to see if it's something known. If not please consider opening a new report providing that example and the guidelines to trigger the bug.