"I do not have any knowledge of perl at all."

https://learn.perl.org, tutorials, Modern Perl. The post you replied to is several years old, unrelated to your problem, and the script you downloaded from somewhere else. Consider reading and understanding How do I post a question effectively?.

In reply to Re^5: "Use of uninitialized value in subroutine entry" warning with HTML::TableExtract by marto
in thread Use of uninitialized value in subroutine entry by Anonymous Monk

Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post; it's "PerlMonks-approved HTML":