When upgrading to cPanel, you may experience issues with Installatron.
If you experience the error:
No response from subprocess (/usr/local/cpanel/base/3rdparty/installatron/index.cgi)
You should upgrade your Installatron installation following the steps on their website:
https://installatron.com/docs/admin/upgrade
If you continue to experience issues with installation, you will need to reach out to Installatron directly for support here: