MagicSpam Installation getting failed in plesk server

[Edward]

Hi Guys

I am tired of looking for a fix and nothing in google as well

Server is a centos 7 latest version and plesk 17.5 version. What ever I do plesk is not able to install magicspam free version from plesk and is looking for that to get fixed

Error getting while trying to install the extension is the below

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Failed
Installation of extension has failed

Execution of /usr/local/psa/tmp/modulehfmXQh/plib/scripts/pre-install.php failed with exit code 1 and the output:
Failed to find operating system package manager rpm or dpkg.
Contact support@magicspam.com with full details of your installation for assistance.
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Any idea

[sumesh]

Please check the permission of rpm binary and change that to 755 if 700. If LES is installed it will change that to 700 and that is the issue