Ekos > Options > Configure > Help This freezes KStars because of a dead link : https://docs.kde.org/stable5/en/kdeedu/kstars//kstars/index.html
Correct link is: https://docs.kde.org/stable5/en/kdeedu/kstars/index.html
This is a problem in KConfigDialog, we do not set the URL ourselves.
Seems fixed.
It is not in my hands !
I was wrong : it is fixed (but it takes up to 10 seconds to open the page https://docs.kde.org/trunk5/en/extragear-edu/kstars/index.html)