Comment 2 for bug 1890749

From the upstream bug tracker, sounds like this is something that should be disabled:

"""
Wondering if it is time to simply delete services zz-sys and zz-network from Logwatch:

    Unlike the stated goal of Logwatch (parsing and analyzing system logs) those two services print (or try to print) real-time info about the system. They don't analyze logs.
    They rely on unsupported, deprecated, or obsolete Perl or system commands.
    I'm guessing they no longer work properly on the vast majority of up-to-date systems.
    They are disabled by default, so the vast majority of Logwatch users don't execute them.

There are other commands and methods of obtaining the same info. The info gathered by zz-sys is available from procfs (/proc filesystem) on most Unix/Unix-like (notably including Linux, Solaris, AIX, BSD), but I don't know how standardized the stored names are. Alternatively, and depending on the system, commands like uname, nproc, lscpu, lshw, free, vmstat and others also get the info that zz-sys intended to list.

So I suggest using a cron job to extract the desired info, rather than Logwatch.
"""