At university, my computer security course covered e-voting. From what I remember, I would guess that the idea is that you can plug this PGP message into a page somewhere and verify that your vote has not been altered. Of course, mere proof of a vote is not proof that it has been counted.

What i got was even worse :

Instead of the voting page, i got a page with the following friendly message:

Internal error
From Wikimedia Elections
Set $wgShowExceptionDetails = true; at the bottom of LocalSettings.php to show detailed debugging information.