Issue Why is plesk trying to run yum on Ubuntu?

[Azendale]

I have an Ubuntu 14.04 server running plesk Onyx.
I'm starting to get hourly emails that "/etc/cron.hourly/asl exited with return code 126"

I tried to look at what that runs, and found this:

root@host4:~# less /etc/cron.hourly/asl
root@host4:~# /var/asl/bin/aum -u
     



Checking versions ...

sh: 1: /bin/rpm: not found
    Kernel version is : current                                       [PASS]
sh: 1: /bin/rpm: not found
    Installing extended kernel modules...
      Firewall modules: failed                                        [FAIL]
    Web Application Firewall is current: 201810181140                 [PASS]
    Generating report ...

    Finished
-------------------------------------------------------------------------------
Errors were encountered:

L CODE SOURCE                        MESSAGE
- ---- ----------------------------- ------------------------------------------
2 9901 ASLCommon::cmd_system         ERROR: '/usr/bin/yum -y --enablerepo=tortix-kernel install xtables-addons  >/dev/null 2>&1 (127)'
216.228.195.5
216.228.195.24
216.228.195.210
216.228.195.209
216.228.195.206

root@host4:~# /usr/bin/yum
-bash: /usr/bin/yum: No such file or directory

Why is plesk trying to run Yum here? How do I fix this issue?

 

[GerdSchrewe]

Please take a look here. Looks like the same error?
Issue - Daily erroro message "run-parts: /etc/cron.daily/asl exited with return code 127"