Resolved Plesk Email Security Amavis installation failed

[imumutkilic]

Server operating system version

Ubuntu 20.04.5 LTS

Plesk version and microupdate number

Plesk Obsidian Version 18.0.47

Hello there,
While installing plesk email security, below is the error I got during Amavis installation.

Can you help me?



The product installation failed
Execution package has failed with exit code 1, stdout: , stderr: ERROR:__main__:Command '['apt-get', '-qq', 'update', '--allow-releaseinfo-change']' returned non-zero exit status 100.
stdout:
stderr:W: GPG error: Index of /kernelcare-debian/8/ stable InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 6DC3D600CDEF74BB
E: The repository 'Index of /kernelcare-debian/8/ stable InRelease' is not signed.

 

[IgorG]

Fi it with

# sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 6DC3D600CDEF74BB
# apt-get clean

 

[imumutkilic]

Fi it with

# sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 6DC3D600CDEF74BB
# apt-get clean

thank you so much. it's resolved.