I browsed through the Qt documentation for the Qt Creator

This page has a broken link: https://doc.qt.io/qtcreator/technical-support.html

See the row:

The link http://qt-apps.org/ does not work.

This site can’t be reached

qt-apps.org’s server IP address could not be found.

Some google webcache shows the following page instead:

https://webcache.googleusercontent.com/search?q=cache:https://www.linux-apps.com/

If this bug should be in the Qt Creator project instead, feel free to move this issue.