Plesk installation or update fails with one of the following errors:
ERROR: There is no product with the ID 'plesk' at the installation source.
ERROR: There is no release with ID 'PLESK_XX_X_XX' of product 'plesk' at the installation source.
Manual installation is interrupted with the following message:
Installation will not continue because of your operating system
"'Centos' 'Linux' '6 .4 '' x86_64 '" is not supported.
Please see the Plesk release notes for the full list of
supported operating systems.
An unsupported Operating System is installed on the server.
Note: you may check if your OS was deprecated here: Planned Deprecations and Removals