Anki Forums

Anki 2.1.47 shows blank main window on Kubuntu 21.10 impish

Installed latest version from ankiweb.net on Kubuntu 21.10 development branch.
No matter what driver I choose, the window remains empty under the menu bar.
image
This is not the first time I have to fight this issue, but this time I cannot get past it.

Despite the core dump at the application exit, the QT_DEBUG_PLUGINS=1 anki
does not seem to point me to anything specific:
Qt debug: QFactoryLoader::QFactoryLoader() checking directory path “/usr/local/share/anki/bin/PyQt5/Qt/plugins/platforms” …
Qt debug: QFactoryLoader::QFactoryLoader() looking at “/usr/local/share/anki/bin/PyQt5/Qt/plugins/platforms/libqeglfs.so”
Qt warning: Found metadata in lib /usr/local/share/anki/bin/PyQt5/Qt/plugins/platforms/libqeglfs.so, metadata=
{
“IID”: “org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3”,
“MetaData”: {
“Keys”: [
“eglfs”
]
},
“archreq”: 0,
“className”: “QEglFSIntegrationPlugin”,
“debug”: false,
“version”: 331520
}

Qt debug: Got keys from plugin meta data (“eglfs”)
Qt debug: QFactoryLoader::QFactoryLoader() looking at “/usr/local/share/anki/bin/PyQt5/Qt/plugins/platforms/libqlinuxfb.so”
Qt warning: Found metadata in lib /usr/local/share/anki/bin/PyQt5/Qt/plugins/platforms/libqlinuxfb.so, metadata=
{
“IID”: “org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3”,
“MetaData”: {
“Keys”: [
“linuxfb”
]
},
“archreq”: 0,
“className”: “QLinuxFbIntegrationPlugin”,
“debug”: false,
“version”: 331520
}

Qt debug: Got keys from plugin meta data (“linuxfb”)
Qt debug: QFactoryLoader::QFactoryLoader() looking at “/usr/local/share/anki/bin/PyQt5/Qt/plugins/platforms/libqminimal.so”
Qt warning: Found metadata in lib /usr/local/share/anki/bin/PyQt5/Qt/plugins/platforms/libqminimal.so, metadata=
{
“IID”: “org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3”,
“MetaData”: {
“Keys”: [
“minimal”
]
},
“archreq”: 0,
“className”: “QMinimalIntegrationPlugin”,
“debug”: false,
“version”: 331520
}

Qt debug: Got keys from plugin meta data (“minimal”)
Qt debug: QFactoryLoader::QFactoryLoader() looking at “/usr/local/share/anki/bin/PyQt5/Qt/plugins/platforms/libqminimalegl.so”
Qt warning: Found metadata in lib /usr/local/share/anki/bin/PyQt5/Qt/plugins/platforms/libqminimalegl.so, metadata=
{
“IID”: “org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3”,
“MetaData”: {
“Keys”: [
“minimalegl”
]
},
“archreq”: 0,
“className”: “QMinimalEglIntegrationPlugin”,
“debug”: false,
“version”: 331520
}

Qt debug: Got keys from plugin meta data (“minimalegl”)
Qt debug: QFactoryLoader::QFactoryLoader() looking at “/usr/local/share/anki/bin/PyQt5/Qt/plugins/platforms/libqoffscreen.so”
Qt warning: Found metadata in lib /usr/local/share/anki/bin/PyQt5/Qt/plugins/platforms/libqoffscreen.so, metadata=
{
“IID”: “org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3”,
“MetaData”: {
“Keys”: [
“offscreen”
]
},
“archreq”: 0,
“className”: “QOffscreenIntegrationPlugin”,
“debug”: false,
“version”: 331520
}

Qt debug: Got keys from plugin meta data (“offscreen”)
Qt debug: QFactoryLoader::QFactoryLoader() looking at “/usr/local/share/anki/bin/PyQt5/Qt/plugins/platforms/libqvnc.so”
Qt warning: Found metadata in lib /usr/local/share/anki/bin/PyQt5/Qt/plugins/platforms/libqvnc.so, metadata=
{
“IID”: “org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3”,
“MetaData”: {
“Keys”: [
“vnc”
]
},
“archreq”: 0,
“className”: “QVncIntegrationPlugin”,
“debug”: false,
“version”: 331520
}

Qt debug: Got keys from plugin meta data (“vnc”)
Qt debug: QFactoryLoader::QFactoryLoader() looking at “/usr/local/share/anki/bin/PyQt5/Qt/plugins/platforms/libqwayland-egl.so”
Qt warning: Found metadata in lib /usr/local/share/anki/bin/PyQt5/Qt/plugins/platforms/libqwayland-egl.so, metadata=
{
“IID”: “org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3”,
“MetaData”: {
“Keys”: [
“wayland-egl”
]
},
“archreq”: 0,
“className”: “QWaylandEglPlatformIntegrationPlugin”,
“debug”: false,
“version”: 331520
}

Qt debug: Got keys from plugin meta data (“wayland-egl”)
Qt debug: QFactoryLoader::QFactoryLoader() looking at “/usr/local/share/anki/bin/PyQt5/Qt/plugins/platforms/libqwayland-generic.so”
Qt warning: Found metadata in lib /usr/local/share/anki/bin/PyQt5/Qt/plugins/platforms/libqwayland-generic.so, metadata=
{
“IID”: “org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3”,
“MetaData”: {
“Keys”: [
“wayland”
]
},
“archreq”: 0,
“className”: “QWaylandIntegrationPlugin”,
“debug”: false,
“version”: 331520
}

Qt debug: Got keys from plugin meta data (“wayland”)
Qt debug: QFactoryLoader::QFactoryLoader() looking at “/usr/local/share/anki/bin/PyQt5/Qt/plugins/platforms/libqwayland-xcomposite-egl.so”
Qt warning: Found metadata in lib /usr/local/share/anki/bin/PyQt5/Qt/plugins/platforms/libqwayland-xcomposite-egl.so, metadata=
{
“IID”: “org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3”,
“MetaData”: {
“Keys”: [
“wayland-xcomposite-egl”
]
},
“archreq”: 0,
“className”: “QWaylandXCompositeEglPlatformIntegrationPlugin”,
“debug”: false,
“version”: 331520
}

Qt debug: Got keys from plugin meta data (“wayland-xcomposite-egl”)
Qt debug: QFactoryLoader::QFactoryLoader() looking at “/usr/local/share/anki/bin/PyQt5/Qt/plugins/platforms/libqwayland-xcomposite-glx.so”
Qt warning: Found metadata in lib /usr/local/share/anki/bin/PyQt5/Qt/plugins/platforms/libqwayland-xcomposite-glx.so, metadata=
{
“IID”: “org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3”,
“MetaData”: {
“Keys”: [
“wayland-xcomposite-glx”
]
},
“archreq”: 0,
“className”: “QWaylandXCompositeGlxPlatformIntegrationPlugin”,
“debug”: false,
“version”: 331520
}

Qt debug: Got keys from plugin meta data (“wayland-xcomposite-glx”)
Qt debug: QFactoryLoader::QFactoryLoader() looking at “/usr/local/share/anki/bin/PyQt5/Qt/plugins/platforms/libqwebgl.so”
Qt warning: Found metadata in lib /usr/local/share/anki/bin/PyQt5/Qt/plugins/platforms/libqwebgl.so, metadata=
{
“IID”: “org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3”,
“MetaData”: {
“Keys”: [
“webgl”
]
},
“archreq”: 0,
“className”: “QWebGLIntegrationPlugin”,
“debug”: false,
“version”: 331520
}

Qt debug: Got keys from plugin meta data (“webgl”)
Qt debug: QFactoryLoader::QFactoryLoader() looking at “/usr/local/share/anki/bin/PyQt5/Qt/plugins/platforms/libqxcb.so”
Qt warning: Found metadata in lib /usr/local/share/anki/bin/PyQt5/Qt/plugins/platforms/libqxcb.so, metadata=
{
“IID”: “org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3”,
“MetaData”: {
“Keys”: [
“xcb”
]
},
“archreq”: 0,
“className”: “QXcbIntegrationPlugin”,
“debug”: false,
“version”: 331520
}

Qt debug: Got keys from plugin meta data (“xcb”)
Qt debug: QFactoryLoader::QFactoryLoader() checking directory path “/usr/local/share/anki/bin/platforms” …
Qt debug: loaded library “/usr/local/share/anki/bin/PyQt5/Qt/plugins/platforms/libqxcb.so”
Qt debug: loaded library “Xcursor”
Qt debug: QFactoryLoader::QFactoryLoader() checking directory path “/usr/local/share/anki/bin/PyQt5/Qt/plugins/platformthemes” …
Qt debug: QFactoryLoader::QFactoryLoader() looking at “/usr/local/share/anki/bin/PyQt5/Qt/plugins/platformthemes/libqgtk2.so”
Qt warning: Found metadata in lib /usr/local/share/anki/bin/PyQt5/Qt/plugins/platformthemes/libqgtk2.so, metadata=
{
“IID”: “org.qt-project.Qt.QPA.QPlatformThemeFactoryInterface.5.1”,
“MetaData”: {
“Keys”: [
“gtk2”
]
},
“archreq”: 0,
“className”: “QGtk2ThemePlugin”,
“debug”: false,
“version”: 331264
}

Qt debug: Got keys from plugin meta data (“gtk2”)
Qt debug: QFactoryLoader::QFactoryLoader() looking at “/usr/local/share/anki/bin/PyQt5/Qt/plugins/platformthemes/libqgtk3.so”
Qt warning: Found metadata in lib /usr/local/share/anki/bin/PyQt5/Qt/plugins/platformthemes/libqgtk3.so, metadata=
{
“IID”: “org.qt-project.Qt.QPA.QPlatformThemeFactoryInterface.5.1”,
“MetaData”: {
“Keys”: [
“gtk3”
]
},
“archreq”: 0,
“className”: “QGtk3ThemePlugin”,
“debug”: false,
“version”: 331520
}

Qt debug: Got keys from plugin meta data (“gtk3”)
Qt debug: QFactoryLoader::QFactoryLoader() looking at “/usr/local/share/anki/bin/PyQt5/Qt/plugins/platformthemes/libqxdgdesktopportal.so”
Qt warning: Found metadata in lib /usr/local/share/anki/bin/PyQt5/Qt/plugins/platformthemes/libqxdgdesktopportal.so, metadata=
{
“IID”: “org.qt-project.Qt.QPA.QPlatformThemeFactoryInterface.5.1”,
“MetaData”: {
“Keys”: [
“xdgdesktopportal”,
“flatpak”,
“snap”
]
},
“archreq”: 0,
“className”: “QXdgDesktopPortalThemePlugin”,
“debug”: false,
“version”: 331520
}

Qt debug: Got keys from plugin meta data (“xdgdesktopportal”, “flatpak”, “snap”)
Qt debug: QFactoryLoader::QFactoryLoader() checking directory path “/usr/local/share/anki/bin/platformthemes” …
Qt debug: QFactoryLoader::QFactoryLoader() checking directory path “/usr/local/share/anki/bin/PyQt5/Qt/plugins/platforminputcontexts” …
Qt debug: QFactoryLoader::QFactoryLoader() looking at “/usr/local/share/anki/bin/PyQt5/Qt/plugins/platforminputcontexts/libcomposeplatforminputcontextplugin.so”
Qt warning: Found metadata in lib /usr/local/share/anki/bin/PyQt5/Qt/plugins/platforminputcontexts/libcomposeplatforminputcontextplugin.so, metadata=
{
“IID”: “org.qt-project.Qt.QPlatformInputContextFactoryInterface.5.1”,
“MetaData”: {
“Keys”: [
“compose”,
“xim”
]
},
“archreq”: 0,
“className”: “QComposePlatformInputContextPlugin”,
“debug”: false,
“version”: 331520
}

Qt debug: Got keys from plugin meta data (“compose”, “xim”)
Qt debug: QFactoryLoader::QFactoryLoader() looking at “/usr/local/share/anki/bin/PyQt5/Qt/plugins/platforminputcontexts/libfcitxplatforminputcontextplugin.so”
Qt warning: Found metadata in lib /usr/local/share/anki/bin/PyQt5/Qt/plugins/platforminputcontexts/libfcitxplatforminputcontextplugin.so, metadata=
{
“IID”: “org.qt-project.Qt.QPlatformInputContextFactoryInterface.5.1”,
“MetaData”: {
“Keys”: [
“fcitx”
]
},
“archreq”: 0,
“className”: “QFcitxPlatformInputContextPlugin”,
“debug”: false,
“version”: 331264
}

Qt debug: Got keys from plugin meta data (“fcitx”)
Qt debug: QFactoryLoader::QFactoryLoader() looking at “/usr/local/share/anki/bin/PyQt5/Qt/plugins/platforminputcontexts/libibusplatforminputcontextplugin.so”
Qt warning: Found metadata in lib /usr/local/share/anki/bin/PyQt5/Qt/plugins/platforminputcontexts/libibusplatforminputcontextplugin.so, metadata=
{
“IID”: “org.qt-project.Qt.QPlatformInputContextFactoryInterface.5.1”,
“MetaData”: {
“Keys”: [
“ibus”
]
},
“archreq”: 0,
“className”: “QIbusPlatformInputContextPlugin”,
“debug”: false,
“version”: 331520
}

Qt debug: Got keys from plugin meta data (“ibus”)
Qt debug: QFactoryLoader::QFactoryLoader() checking directory path “/usr/local/share/anki/bin/platforminputcontexts” …
Qt debug: loaded library “/usr/local/share/anki/bin/PyQt5/Qt/plugins/platforminputcontexts/libibusplatforminputcontextplugin.so”
Qt debug: QFactoryLoader::QFactoryLoader() checking directory path “/usr/local/share/anki/bin/PyQt5/Qt/plugins/xcbglintegrations” …
Qt debug: QFactoryLoader::QFactoryLoader() looking at “/usr/local/share/anki/bin/PyQt5/Qt/plugins/xcbglintegrations/libqxcb-egl-integration.so”
Qt warning: Found metadata in lib /usr/local/share/anki/bin/PyQt5/Qt/plugins/xcbglintegrations/libqxcb-egl-integration.so, metadata=
{
“IID”: “org.qt-project.Qt.QPA.Xcb.QXcbGlIntegrationFactoryInterface.5.5”,
“MetaData”: {
“Keys”: [
“xcb_egl”
]
},
“archreq”: 0,
“className”: “QXcbEglIntegrationPlugin”,
“debug”: false,
“version”: 331520
}

Qt debug: Got keys from plugin meta data (“xcb_egl”)
Qt debug: QFactoryLoader::QFactoryLoader() looking at “/usr/local/share/anki/bin/PyQt5/Qt/plugins/xcbglintegrations/libqxcb-glx-integration.so”
Qt warning: Found metadata in lib /usr/local/share/anki/bin/PyQt5/Qt/plugins/xcbglintegrations/libqxcb-glx-integration.so, metadata=
{
“IID”: “org.qt-project.Qt.QPA.Xcb.QXcbGlIntegrationFactoryInterface.5.5”,
“MetaData”: {
“Keys”: [
“xcb_glx”
]
},
“archreq”: 0,
“className”: “QXcbGlxIntegrationPlugin”,
“debug”: false,
“version”: 331520
}

Qt debug: Got keys from plugin meta data (“xcb_glx”)
Qt debug: QFactoryLoader::QFactoryLoader() checking directory path “/usr/local/share/anki/bin/xcbglintegrations” …
Qt debug: loaded library “/usr/local/share/anki/bin/PyQt5/Qt/plugins/xcbglintegrations/libqxcb-glx-integration.so”
Qt debug: QFactoryLoader::QFactoryLoader() checking directory path “/usr/local/share/anki/bin/PyQt5/Qt/plugins/styles” …
Qt debug: QFactoryLoader::QFactoryLoader() checking directory path “/usr/local/share/anki/bin/styles” …
Qt debug: QFactoryLoader::QFactoryLoader() checking directory path “/usr/local/share/anki/bin/PyQt5/Qt/plugins/imageformats” …
Qt debug: QFactoryLoader::QFactoryLoader() looking at “/usr/local/share/anki/bin/PyQt5/Qt/plugins/imageformats/libqgif.so”
Qt warning: Found metadata in lib /usr/local/share/anki/bin/PyQt5/Qt/plugins/imageformats/libqgif.so, metadata=
{
“IID”: “org.qt-project.Qt.QImageIOHandlerFactoryInterface”,
“MetaData”: {
“Keys”: [
“gif”
],
“MimeTypes”: [
“image/gif”
]
},
“archreq”: 0,
“className”: “QGifPlugin”,
“debug”: false,
“version”: 331520
}

Qt debug: Got keys from plugin meta data (“gif”)
Qt debug: QFactoryLoader::QFactoryLoader() looking at “/usr/local/share/anki/bin/PyQt5/Qt/plugins/imageformats/libqicns.so”
Qt warning: Found metadata in lib /usr/local/share/anki/bin/PyQt5/Qt/plugins/imageformats/libqicns.so, metadata=
{
“IID”: “org.qt-project.Qt.QImageIOHandlerFactoryInterface”,
“MetaData”: {
“Keys”: [
“icns”
],
“MimeTypes”: [
“image/x-icns”
]
},
“archreq”: 0,
“className”: “QICNSPlugin”,
“debug”: false,
“version”: 331520
}

Qt debug: Got keys from plugin meta data (“icns”)
Qt debug: QFactoryLoader::QFactoryLoader() looking at “/usr/local/share/anki/bin/PyQt5/Qt/plugins/imageformats/libqico.so”
Qt warning: Found metadata in lib /usr/local/share/anki/bin/PyQt5/Qt/plugins/imageformats/libqico.so, metadata=
{
“IID”: “org.qt-project.Qt.QImageIOHandlerFactoryInterface”,
“MetaData”: {
“Keys”: [
“ico”,
“cur”
],
“MimeTypes”: [
“image/vnd.microsoft.icon”,
“image/vnd.microsoft.icon”
]
},
“archreq”: 0,
“className”: “QICOPlugin”,
“debug”: false,
“version”: 331520
}

Qt debug: Got keys from plugin meta data (“ico”, “cur”)
Qt debug: QFactoryLoader::QFactoryLoader() looking at “/usr/local/share/anki/bin/PyQt5/Qt/plugins/imageformats/libqjpeg.so”
Qt warning: Found metadata in lib /usr/local/share/anki/bin/PyQt5/Qt/plugins/imageformats/libqjpeg.so, metadata=
{
“IID”: “org.qt-project.Qt.QImageIOHandlerFactoryInterface”,
“MetaData”: {
“Keys”: [
“jpg”,
“jpeg”
],
“MimeTypes”: [
“image/jpeg”,
“image/jpeg”
]
},
“archreq”: 0,
“className”: “QJpegPlugin”,
“debug”: false,
“version”: 331520
}

Qt debug: Got keys from plugin meta data (“jpg”, “jpeg”)
Qt debug: QFactoryLoader::QFactoryLoader() looking at “/usr/local/share/anki/bin/PyQt5/Qt/plugins/imageformats/libqsvg.so”
Qt warning: Found metadata in lib /usr/local/share/anki/bin/PyQt5/Qt/plugins/imageformats/libqsvg.so, metadata=
{
“IID”: “org.qt-project.Qt.QImageIOHandlerFactoryInterface”,
“MetaData”: {
“Keys”: [
“svg”,
“svgz”
],
“MimeTypes”: [
“image/svg+xml”,
“image/svg+xml-compressed”
]
},
“archreq”: 0,
“className”: “QSvgPlugin”,
“debug”: false,
“version”: 331520
}

Qt debug: Got keys from plugin meta data (“svg”, “svgz”)
Qt debug: QFactoryLoader::QFactoryLoader() looking at “/usr/local/share/anki/bin/PyQt5/Qt/plugins/imageformats/libqtga.so”
Qt warning: Found metadata in lib /usr/local/share/anki/bin/PyQt5/Qt/plugins/imageformats/libqtga.so, metadata=
{
“IID”: “org.qt-project.Qt.QImageIOHandlerFactoryInterface”,
“MetaData”: {
“Keys”: [
“tga”
],
“MimeTypes”: [
“image/x-tga”
]
},
“archreq”: 0,
“className”: “QTgaPlugin”,
“debug”: false,
“version”: 331520
}

Qt debug: Got keys from plugin meta data (“tga”)
Qt debug: QFactoryLoader::QFactoryLoader() looking at “/usr/local/share/anki/bin/PyQt5/Qt/plugins/imageformats/libqtiff.so”
Qt warning: Found metadata in lib /usr/local/share/anki/bin/PyQt5/Qt/plugins/imageformats/libqtiff.so, metadata=
{
“IID”: “org.qt-project.Qt.QImageIOHandlerFactoryInterface”,
“MetaData”: {
“Keys”: [
“tiff”,
“tif”
],
“MimeTypes”: [
“image/tiff”,
“image/tiff”
]
},
“archreq”: 0,
“className”: “QTiffPlugin”,
“debug”: false,
“version”: 331520
}

Qt debug: Got keys from plugin meta data (“tiff”, “tif”)
Qt debug: QFactoryLoader::QFactoryLoader() looking at “/usr/local/share/anki/bin/PyQt5/Qt/plugins/imageformats/libqwbmp.so”
Qt warning: Found metadata in lib /usr/local/share/anki/bin/PyQt5/Qt/plugins/imageformats/libqwbmp.so, metadata=
{
“IID”: “org.qt-project.Qt.QImageIOHandlerFactoryInterface”,
“MetaData”: {
“Keys”: [
“wbmp”
],
“MimeTypes”: [
“image/vnd.wap.wbmp”
]
},
“archreq”: 0,
“className”: “QWbmpPlugin”,
“debug”: false,
“version”: 331520
}

Qt debug: Got keys from plugin meta data (“wbmp”)
Qt debug: QFactoryLoader::QFactoryLoader() looking at “/usr/local/share/anki/bin/PyQt5/Qt/plugins/imageformats/libqwebp.so”
Qt warning: Found metadata in lib /usr/local/share/anki/bin/PyQt5/Qt/plugins/imageformats/libqwebp.so, metadata=
{
“IID”: “org.qt-project.Qt.QImageIOHandlerFactoryInterface”,
“MetaData”: {
“Keys”: [
“webp”
],
“MimeTypes”: [
“image/webp”
]
},
“archreq”: 0,
“className”: “QWebpPlugin”,
“debug”: false,
“version”: 331520
}

Qt debug: Got keys from plugin meta data (“webp”)
Qt debug: QFactoryLoader::QFactoryLoader() checking directory path “/usr/local/share/anki/bin/imageformats” …
Qt debug: loaded library “/usr/local/share/anki/bin/PyQt5/Qt/plugins/imageformats/libqgif.so”
Qt debug: loaded library “/usr/local/share/anki/bin/PyQt5/Qt/plugins/imageformats/libqicns.so”
Qt debug: loaded library “/usr/local/share/anki/bin/PyQt5/Qt/plugins/imageformats/libqico.so”
Qt debug: loaded library “/usr/local/share/anki/bin/PyQt5/Qt/plugins/imageformats/libqjpeg.so”
Qt debug: loaded library “/usr/local/share/anki/bin/PyQt5/Qt/plugins/imageformats/libqsvg.so”
Qt debug: loaded library “/usr/local/share/anki/bin/PyQt5/Qt/plugins/imageformats/libqtga.so”
Qt debug: loaded library “/usr/local/share/anki/bin/PyQt5/Qt/plugins/imageformats/libqtiff.so”
Qt debug: loaded library “/usr/local/share/anki/bin/PyQt5/Qt/plugins/imageformats/libqwbmp.so”
Qt debug: loaded library “/usr/local/share/anki/bin/PyQt5/Qt/plugins/imageformats/libqwebp.so”
Qt debug: QFactoryLoader::QFactoryLoader() checking directory path “/usr/local/share/anki/bin/PyQt5/Qt/plugins/iconengines” …
Qt debug: QFactoryLoader::QFactoryLoader() looking at “/usr/local/share/anki/bin/PyQt5/Qt/plugins/iconengines/libqsvgicon.so”
Qt warning: Found metadata in lib /usr/local/share/anki/bin/PyQt5/Qt/plugins/iconengines/libqsvgicon.so, metadata=
{
“IID”: “org.qt-project.Qt.QIconEngineFactoryInterface”,
“MetaData”: {
“Keys”: [
“svg”,
“svgz”,
“svg.gz”
]
},
“archreq”: 0,
“className”: “QSvgIconPlugin”,
“debug”: false,
“version”: 331520
}

Qt debug: Got keys from plugin meta data (“svg”, “svgz”, “svg.gz”)
Qt debug: QFactoryLoader::QFactoryLoader() checking directory path “/usr/local/share/anki/bin/iconengines” …
Qt debug: QFactoryLoader::QFactoryLoader() checking directory path “/usr/local/share/anki/bin/PyQt5/Qt/plugins/accessible” …
Qt debug: QFactoryLoader::QFactoryLoader() checking directory path “/usr/local/share/anki/bin/accessible” …
Qt debug: QFactoryLoader::QFactoryLoader() checking directory path “/usr/local/share/anki/bin/PyQt5/Qt/plugins/accessiblebridge” …
Qt debug: QFactoryLoader::QFactoryLoader() checking directory path “/usr/local/share/anki/bin/accessiblebridge” …
Segmentation fault (core dumped)

You could try Running from Python - Frequently Asked Questions

On Ubuntu there is only python3:
mariusz@md:~> which python
mariusz@md:~> which python3
/usr/bin/python3

This output indicates wayland issue. Read this thread
Perhaps forcing the use of X11 may resolve the issue.

How do I force X11. I tried export QT_QPA_PLATFORM=xcb and the result did not change.
I also see Changes in 2.1.45 - Anki Betas following here:
“Force x11 mode when the packaged build is run on a system that tells Qt to use Wayland, as Wayland is not currently supported by the packaged build.”
I am not happy with wayland yet, so I stick to X11.

I’m not sure the logs point to Wayland, and Anki should already be forcing X11. I still recommend you try running from source, using python3 instead of python if necessary.

Did all. Including the “./anki-venv/bin/pip install pyqt5==5.13 pyqtwebengine==5.13.0” part and the window remains empty. “Then I may unfortunately be out of luck.” It’s a pity.

I may be lucky though. Tried sudo and got error. Used --no-sandbox switch and worked.
Used -no-sandbox as a regular user and still works. So this is the charm (not listed in man nor --help).
Now it seems to be a developer task to figure out why it is necessary so it doesn’t fail in the future.