The applet does not work on Plasma 5.22

[20manas]

It doesn't work because it relies on ksysguard which is not present on Plasma 5.22.

It can be fixed manually by installing ksysguard (sudo apt install ksysguard or your distro's equivalent).

[oglueck]

In 5.22 you can replace it with System Monitor CPU + Memory widgets. They do the same thing even nicer and have more options.

[Lastique]

It can be fixed manually by installing ksysguard (sudo apt install ksysguard or your distro's equivalent).

The problem is ksysguard is removed and cannot be installed.

[Loirooriol]

This fork works: https://github.com/orblazer/plasma-applet-resources-monitor