Unable to load page: The specified configuration cannot be used.

[The-Compiler]

The above error shows up from time to time (from QtWebKit) when continuing to use a page/QNetworkAccessManager while the network has changed (e.g. WiFi -> LAN)

[The-Compiler]

References:

https://code.google.com/p/dukto/issues/detail?id=9
http://thedndsanctuary.eu/index.php?topic=424.0
https://bugreports.qt-project.org/browse/QTBUG-40234

[The-Compiler]

A workaround would be to clone the QWebPage (since you can't change the QNetworkAccessManager after it's used) if that error happens and retry the operation... but that's rather risky to do. Maybe try that once.

[The-Compiler]

There is now a proposed fix in Qt at https://codereview.qt-project.org/#/c/98115/

[The-Compiler]

Fixed in Qt 5.4.

[The-Compiler]

On 5.4.1 this still seems to be an issue when roaming between different APs with the same SSID according to rieper in IRC.

Here opening a new tab (with a new QNAM) doesn't help in this case for some reason.

[The-Compiler]

Reported upstream as QTBUG-46542.

I don't think there's anything more I can do, so I'm closing this.

Please vote/comment/... there 😄

[The-Compiler]

I'm still seeing this with 5.5.1 in an eduroam network, FWIW... 😟

[The-Compiler]

Anyone else ever seen this with QtWebKit and Qt versions newer than 5.5? I don't use QtWebKit anymore, so it's hard to tell.

[Nicholas42]

I get this error sometimes when running :adblock-update. I think it is under the same circumstances (switching between networks). It always works after restarting. I haven't looked into it very carefully and will update this when I have. Note that I use webengine, not webkit!

qutebrowser v2.3.0
Git commit: 
Backend: QtWebEngine 5.15.5, based on Chromium 87.0.4280.144
Qt: 5.15.2

CPython: 3.9.6
PyQt: 5.15.4

sip: 6.1.0.dev2104271705
colorama: 0.4.4
jinja2: 3.0.1
pygments: 2.9.0
yaml: 5.4.1
adblock: 0.5.0
PyQt5.QtWebEngineWidgets: yes
PyQt5.QtWebEngine: 5.15.4
PyQt5.QtWebKitWidgets: yes
pdf.js: 2.10.377 (/usr/share/pdf.js/build/pdf.js)
sqlite: 3.36.0
QtNetwork SSL: OpenSSL 1.1.1k  25 Mar 2021

Style: QFusionStyle
Platform plugin: xcb
OpenGL: Intel, 4.6 (Compatibility Profile) Mesa 21.1.5
Platform: Linux-5.13.4-arch2-1-x86_64-with-glibc2.33, 64bit
Linux distribution: Arch Linux (arch)
Frozen: False
Imported from /usr/lib/python3.9/site-packages/qutebrowser
Using Python from /usr/bin/python3
Qt library executable path: /usr/lib/qt/libexec, data path: /usr/share/qt

Uptime: 6:19:01

[ValdikSS]

Probably the same Qt issue in crow-translate
crow-translate/crow-translate#383

[ValdikSS]

Workaround:
Disable "networkbearer" plugin of Qt5
$ sudo mv /usr/lib64/qt5/plugins/bearer /usr/lib64/qt5/plugins/bearer.mv

Thanks to crow-translate/crow-translate#383 (comment)