Update: Issue was solved for me by additionally installing the package qml-module-org-kde-kcm
Suggestion: Please add the following packages to the dependecies of kdenlive: qml-module-org-kde-newstuff qml-module-org-kde-kcm Reference: I found this solution here, the issue seems to be known already at kdenlive: https://bugs.kde.org/show_bug.cgi?id=463203
