misconfigured
Unless you did something really stupid and deleted system libraries or something like that, no configuration should cause crashes. Please make a bug report about it at bugs.kde.org. You might not be able to fix it yourself, but crashes are often relatively easy to diagnose and fix for a developer.
The github repo has tons of issues about the problems caused by the hacks (from the cursor not being recorded, to it not working in Flatpak, not working with virtual displays, to even preventing graphical sessions from starting!) with the suggested solution of just using the remote desktop portal… I don’t know what the problem is, but it’s not a lack of knowledge.