Error including libraries: Can't locate /db_utils.pl in @INC (@INC contains: /var/www/vhosts/web1.pmswebpromotion.com/httpdocs/lardos.net/cgi/pages /etc/perl /usr/local/lib/x86_64-linux-gnu/perl/5.24.1 /usr/local/share/perl/5.24.1 /usr/lib/x86_64-linux-gnu/perl5/5.24 /usr/share/perl5 /usr/lib/x86_64-linux-gnu/perl/5.24 /usr/share/perl/5.24 /usr/local/lib/site_perl /etc/apache2) at /var/www/vhosts/web1.pmswebpromotion.com/httpdocs/lardos.net/cgi/pages/rate.pl line 31.

Make sure they exist, permissions are set properly, and paths are set correctly.