The INFO.XML file could not be found!

This happens if the scripts are not downloaded. The fix is to run CRON :

SSH to your server as root and enter following commands:

For cPanel:
# /usr/local/cpanel/3rdparty/bin/php /usr/local/cpanel/whostmgr/docroot/cgi/softaculous/cron.php

For Direct Admin:

#  /usr/local/bin/php -d open_basedir=/ -d safe_mode=0 -d disable_functions="" /usr/local/directadmin/plugins/softaculous/cron.php

For Plesk:
SSH to your server as root and enter following command :

# php /usr/local/softaculous/cron.php

Hope it helps someone...