Error with cloudmin installation in ubuntu 18.04.

W: GPG error: http://cloudmin.virtualmin.com/real/debian binary/ Release: The following signatures were invalid: 1719003ACE3E5A41E2DE70DFD97A3AE911F63C51 E: The repository 'http://cloudmin.virtualmin.com/real/debian binary/ Release' is not signed. N: Updating from such a repository can't be done securely, and is therefore disabled by default. N: See apt-secure(8) manpage for repository creation and user configuration details. N: Usage of apt_auth.conf(5) should be preferred over embedding login information directly in the sources.list(5) entry for 'http://cloudmin.virtualmin.com/real/debian' .. done

... E: Unable to locate package webmin-server-manager E: Unable to locate package webmin-security-updates .. install failed

Some triks to get this working in ubuntu 18.04?

Regards,

Vitor E A Feliciano

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