ERROR:extension_system_qt.cpp(122)] Failed to parse extension manifest.

[v.n.lee]

code_text

import sys
from PySide2.QtWidgets import *
from PySide2.QtWebEngineWidgets import *

class MainWindow(QMainWindow):
    def __init__(self):
        super().__init__()
        self.setWindowTitle('my web')
        self.resize(900, 550)
        self.setWindowIcon(QIcon('./icons/penguin.png'))
        self.web = QWebEngineView(self)
        self.web.load(QUrl('https://www.baidu.com'))
        self.setCentralWidget(self.web)


if __name__ == '__main__':
    app = QApplication(sys.argv)
    main_win = MainWindow()
    main_win.show()
    exit_code = app.exec_()
    sys.exit(exit_code)

#############

when I run it , IDE say:[63152:80864:1227/175414.020:ERROR:extension_system_qt.cpp(122)] Failed to parse extension manifest.

[SGaist]

Hi,

What version of PySide2 ?
What version of python ?
What OS ?
What IDE ?

[v.n.lee]

@SGaist
my code is:

import sys
from PySide2.QtCore import QUrl
from PySide2.QtWidgets import *
from PySide2.QtWebEngineWidgets import *

class MainWindow(QMainWindow):
    def __init__(self):
        super().__init__()
        self.setWindowTitle('my web')
        self.resize(900, 550)
        self.setWindowIcon(QIcon('./icons/penguin.png'))
        self.web = QWebEngineView(self)
        self.web.load(QUrl('https://www.baidu.com'))
        self.setCentralWidget(self.web)


if __name__ == '__main__':
    app = QApplication(sys.argv)
    main_win = MainWindow()
    main_win.show()
    exit_code = app.exec_()
    sys.exit(exit_code)

python : 3.7 (X64)
pyside2 : 5.14.0
I have two cumputer , all of them can't run this code
windows : win10 home (X64) \ IDE : pycharm 2019.2
windows : win10 LTSC (X64) \ IDE : pycharm 2019.3

But , if I don't put QWebEngineView in the window，just put some other widget in the window ，the window can be displayed normally

[SGaist]

I haven't used QtWebEngine with Python but IIRC there's an initialisation function to call for that module at least in C++, you should check the equivalent for Python.

[v.n.lee]

@SGaist
when I use pyqt5，it works normally

[dcotruta]

@v-n-lee See: https://forum.qt.io/topic/113413/pyside2-failed-to-parse-extension-manifest

[Ryna]

I was using QtWebEngineView with Ubuntu 18.04 + Qt 5.14.2 and my application was running properly from deployment package. I have upgraded ubuntu to 20 LTS and Qt to 5.15.0. Now after upgrade, application from deployment package shows issues like-

ERROR:extension_system_qt.cpp(122)] Failed to parse extension manifest.

Though from QtCreator it still works well. I am using C++ for development. I am sure that issue is because of QtWebEngineView as after commenting all functionalities related to QtWebEngineView, deployment package works well.
Any help is much appreciated. Thanks

[Ryna]

@SGaist I have put up my issue below, which is wrt C++. Can you please let me know which initialization function we need to use in C++? I am getting this issue in C++.

[SGaist]

I was thinking about qtwebengine::initialize but I do not think it's going to help.

[Ryna]

@SGaist yeah.. This won't help..
Issue is fixed for me now.. I was facing this issue because in my deployment package, I hadn't updated resources and translations for QtWebEngineView so I was getting this issue. Updating these two folders worked fine for me.