Thanks Jan Dalheimer Thanks Jean-Baptiste Peter
From your answers I understood many things. I tried both to use QGIS 3.38.0 installed in win10 via .msi and the version via OSGeo4W setup; In the first case I added qtwebengine via "pip install qtwebengine", in the second case I installed the "python3-pyqtwebengine" package via OsGeo4w setup In both installations I get the same result: QtWebEngine it does not work well I also tried to create a new test plugin and I get the same result, I can't even view a web page. Is there an example of a basic plugin that I can see? Or can someone create it? The clue: If I use qt designer to insert a QtWebEngineView into the plugin graphics it works well, even when setting a static web page. But if I open QGIS that plugin won't work, why does this happen? I would therefore think that it is just a question of dependency . For now I noticed this: 1) From QGIS version 3.38.0 I can use "from qgis.PyQt.QtWebEngineWidgets import *" instead of "from PyQt5.QtWebEngineWidgets import *" 2) with qgis 3.38.0 .msi installation this dependency is missing: qt5-devel (5.15.13-1) Qt5 headers and libraries (Development) Required by: python3-pyqtwebengine 3) with OSGeo4W setup these dependencies are required: python3-core (3.12.4-1) Python core interpreter and runtime Required by: python3-pyqtwebengine, python3-pyqt5, python3-pyqt5-sip python3-pyqt5 (5.15.10-1) Python bindings for the Qt cross platform application toolkit Required by: python3-pyqtwebengine python3-pyqt5-sip (12.13.0-1) The sip module support for PyQt5 Required by: python3-pyqtwebengine, python3-pyqt5 qt5-devel (5.15.13-1) Qt5 headers and libraries (Development) Required by: python3-pyqtwebengine qt5-libs (5.15.13-1) Qt5 runtime libraries Required by: python3-pyqtwebengine, python3-pyqt5, qt5-devel, qtwebkit-libs Thank you all Andrea Ordonselli OpenGIS.it
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