I finally found the problème from qt documentation.
My solution is to add : QTQUICK_COMPILER_SKIPPED_RESOURCES += testgooglemapwebengine.qrc in my .pro file.

@LovelyGrace said in webenginewidgets on .pro of library produce error:

but when I am trying to build the whole project from sub dir project including the library and the console, it produce the error

You need to add Qt += webenginewidgets to your console project as well.

I use QCoreApplication::setAttribute(Qt::AA_UseOpenGLES); It can really screen bugs。but , error too;

@pmh4514

I received an answer from Qt support, it solved the problem. Their answer below:

On a virtual machine the OpenGL support might not be enough for rendering Qt WebEngine, so the quickest way to check if this is the case here is to do:

set QT_OPENGL=angle

on the command line or add:

QGuiApplication::setAttribute(Qt::AA_UseOpenGLES);

before the creation of the application object

@mpergand you are right, this line solved the problem. Thank you very much!

@allenck
ahh, yes that would do it.
It can tell Qt to look from plugins in other places.
http://doc.qt.io/qt-5/qt-conf.html

Good catch :)

Ok this put me in the right direction, having subclassed both the view and page, and using createWindow and acceptNavigationRequest, I see how this all works now.. Thanks!

@mrjj Thanks. I knows that. But I want know is there any approach to solve this in qtwebengine. Such as adding some plugins?

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

Did you install MSVC2015 before or after Qt ?

Can you see it in the Compilers tab ?

@Matty

I'm running into this now. Were you able to find a solution?

@ThatDud3 well, Qt 5.5 have been released, but I don't see nothing about proxy in QWebEngineSettings XD It is real problem...

Hi,
After 3 years... Anyway switching from debug to release compiler solved the problem for me.