If alkimia has been configured to use Web-Engine or Webkit, these components are used to display queried (HTML) data. If neither of these components is available, QTextBrowser would be an alternative.
STEPS TO REPRODUCE
1. download alkimia source
2. cmake configure the source with -DBUILD_WITH_WEBKIT=off
3. build binaries from the source
4. run onlinequoteseditor5
5. select one quote source and press "check source"
In the browser window there is no html data displayed
The browser window should display the retrieved html data
Linux: openSUSE_Leap 15.2
KDE Frameworks Version: 5.71
Qt Version: 5.12
A possibly relevant merge request was started @ https://invent.kde.org/office/alkimia/-/merge_requests/12
Git commit 1ec58e098596f3912806c3816bd50c6f5a21b009 by Ralf Habacker.
Committed on 09/08/2021 at 12:08.
Pushed by habacker into branch '8.1'.
Add support for viewing retrieved HTML data without web engine or kit
M +11 -6 CMakeLists.txt
M +4 -7 src/alkwebpage.cpp
M +3 -4 src/alkwebpage.h
M +9 -5 tools/onlinequoteseditor/mainwindow.cpp