The HTML of the site has changed so it does not work. You can workaround it by modifying the script on your own:
Click on the Greasemonky arrow, "manage user scripts", choose the PGC one and click on Edit. Change the line 553 from
$('#ctl00_divContentMain div.span-17 div.Note.Disclaimer').remove();
$('#divContentMain div.span-17 div.Note.Disclaimer').remove();
Edit: I submitted PR to Github.