SUMMARY The new KDEnlive version, installed from PPA, has no themes available, and the default one is faulty, as most of the icons and buttons are not visible. SOFTWARE/OS VERSIONS Windows: macOS: Linux/KDE Plasma: Ubuntu 20.04, Gnome 3.36.3 (available in About System) KDE Plasma Version: KDE Frameworks Version: Qt Version: ADDITIONAL INFORMATION
Created attachment 131436 [details] Screenshot
Thanks for your report! Please try to install kde-style-breeze via $ apt install kde-style-breeze But I think it would be good to add this package as a dependency to the PPA
breeze and breeze-icons have been made hard-dependencies since 20.08.1. however, the widget switching menu still uses a lib from plasma-desktop which is a too big dep to force pulling.