Unable to activate SMART Scheduled Tasks

Hi, on my 3 machines (a Raspeberry Pi, an old HP N54L home server, and a simple x86 machine) when I try to select a device to perform a SMART scheduled task there are no items to select (see picture).

I'm doing something wrong ? Is a well known bug ?

Thank you in advance for your help

Silly me... no, I didn't do that

Thank you so much, problem solved!