When using Softaculous, are you getting error that says Child failed to make LIVEAPI connection to cPanel?
In most cases, the error appears after the server has been updated with the latest version of Cpanel.
Run the following commands using the SSH Terminal:
chown root:root /usr/local/cpanel/whostmgr/docroot/cgi/softaculous/bin/soft
chmod 4555 /usr/local/cpanel/whostmgr/docroot/cgi/softaculous/bin/soft