The line of code producing the error is (in open_file):

$array = $attrs->{csv_csv_in}->getline ($tbl->{fh}) or
    croak "Missing first row";
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The error is that $attrs->{csv_csv_in} is undef.
As you can see, from a few lines up, $attrs->{csv_csv_in} is simply a copy of $meta->{csv_in} (which must therefore also be undef).

Beyond that, I can't help much. There's also this comment in CSV.pm, which may be of assistance in working out how the error has come to be:

# open_table (0 is used up to and including DBI-1.1611
# Later versions use open_file (see DBD::CSV::Table)
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And you can see that the $DBD::File::VERSION is significant.

Cheers,
Rob