Hi folks, when launching settings in Knotes it says:

failed to extract plugin meta data from 'usr/lib/qt/plugins/kcm_note.so'
During the last update of your system, a problem occurred and an isolated control module of the previous version was left over
There are older modules of programs that do not belong to KDE proper

Searching for an answer make me think it may be a QT thingy.
I don't know how to deal with:

During the last update of your system, a problem occurred and an isolated control module of the previous version was left over
There are older modules of programs that do not belong to KDE proper

Knotes is quite useless without configuration: though it runs , but can't be customized and 'forgets' all settings of course.
What I did: uninstalled it, deleted usr/lib/qt/plugins/kcm_note.so, reinstalled it to no avail

Anyone has a clue?

Issue solved by an update 20.12.1-1 to 20.12.1-2 just an hour after I posted this question