Error Child failed to make LIVEAPI connection to cPanel. - Softaculous

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The Softaculous Team has launched Softaculous 5.1.5 in Stable branch 

1) [Bug Fix] : On cPanel servers when the permission for Softaculous 
binary was incorrect, Softaculous was starting multiple processes. This 
is fixed now. 

Incorrect binary permission Child failed to make LIVEAPI connection to cPanel.

Just Execute these commands at your server

chown root:root /usr/local/cpanel/whostmgr/docroot/cgi/softaculous/bin/soft 
chmod 4555 /usr/local/cpanel/whostmgr/docroot/cgi/softaculous/bin/soft

Now Done.