In kwin/scripting/scriptedeffect.(h|cpp) the Plasma::ConfigLoader class is used. In frameworks 5 the functionality of the ConfigLoader got moved into a new class called KConfigLoader.

This task requires to replace the usage of Plasma::ConfigLoader by KConfigLoader. It's mostly search and reply, but partly there needs to be API adjustments - see the documentation of KConfigLoader.

For this task a build-environment of kde-workspace on top of Qt5 and KF5 is required. If you don't have such a setup follow the steps of https://community.kde.org/Frameworks/Building - be aware that this is time consuming. Please only claim the task if you have this setup.