Software error:

Can't locate riconfig.pm in @INC (you may need to install the riconfig module) (@INC contains: /usr/lib/perl5/site_perl/5.26.1/x86_64-linux-thread-multi /usr/lib/perl5/site_perl/5.26.1 /usr/lib/perl5/vendor_perl/5.26.1/x86_64-linux-thread-multi /usr/lib/perl5/vendor_perl/5.26.1 /usr/lib/perl5/5.26.1/x86_64-linux-thread-multi /usr/lib/perl5/5.26.1 /usr/lib/perl5/site_perl) at /home/new/vgershov.lib.ru/cgi/risearch/search.pl line 21.
BEGIN failed--compilation aborted at /home/new/vgershov.lib.ru/cgi/risearch/search.pl line 21.

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