I had a typo in my post:

perl -l HTML::TableExtract
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should have been:

perldoc -l HTML::TableExtract
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In any case, it appears that the module is installed correctly. I expect the following code in a script to work just fine too (no error). Just put these 3 line in a .pl file, then execute it:

use strict;
use warnings;
use HTML::TableExtract;
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