Dear Maintainer, To use the CopyQ with Plasma version >= 6.5, we need to include the *KGuiAddons* library as well on the build process. Please, build the CopyQ package with *KGuiAddons* so it works under KDE Plasma on Debian Forky. Upstream Reference: https://github.com/hluk/CopyQ/issues/3663#issuecomment-5157068036