Yeah, it's complaining because the HTML table expects 7 elements and is only getting 4. I'm sure there is better code to fix this up, but here is a quick fix to ensure that addRow always gets 7 defined elements:

$Wtable->addRow(map { $_ // "" } (split /\s\s+/, $Wlog->readline)[0 ..
+ 6]) for (1..24);
[download]

Note that this will mean any lines containing more than 7 elements will be truncated.

Updated for brain fart