PLink 0.70 Fatal Error

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PLink has exited with the following error:

Can't locate auto/plink/do_ubbc.al in @INC (@INC contains: . /etc/perl /usr/local/lib/x86_64-linux-gnu/perl/5.26.1 /usr/local/share/perl/5.26.1 /usr/lib/x86_64-linux-gnu/perl5/5.26 /usr/share/perl5 /usr/lib/x86_64-linux-gnu/perl/5.26 /usr/share/perl/5.26 /usr/local/lib/site_perl /usr/lib/x86_64-linux-gnu/perl-base)

This error was reported at: topics.cgi line 802.

Please inform the webmaster if this error persists.