Bug#1000976: closed by Debian FTP Masters (reply to Patrick Franz ) (Bug#1000976: fixed in plasma-systemmonitor 5.23.4-2)

[Emilian Nowak]

On 2021-12-03 at 19:17 Patrick Franz wrote:
> In this case, "qml-module-org-kde-kcm" seems to be missing.

Yes - installing this module allows to start plasma-systemmonitor. 
Thanks.