https://directory.fsf.org/wiki/Special:RunQuery
You must specify a form name in the URL; the URL should look like "Special:RunQuery/<form name>".
https://directory.fsf.org/wiki/Special:GetData is blank, I suggest this text:
You must specify a page name in the URL; the URL should look like "Special:GetData/<page name>".
Here's the HTML markup used by https://directory.fsf.org/wiki/Special:RunQuery
<div id="mw-content-text"><p class="error">You must specify a form name in the URL;
the URL should look like "Special:RunQuery/<form name>".</p>
Making a guess. Please associate project tags to tasks so people can find such tasks in their projects. Thanks.