Discover cannot open appstream of KDE

Hi mrmazda,
thank you for replay!
You said it right. On the other side the Discover message says “report this issue” not “report as bug”. Further I think, this issue is not important for me. So I opted to inform people that are more familiar with issues and system bugs.

It was only an attempt. I upgraded to Leap 15.4 and found a KMail (5.19.3) with a bug, which has been already solved in ver. 5.22.1. So I wanted to iInstall this version, because it is not available on Leap 15.4 repositories yet.