https://vibed.org/api/ and every page there I've looked at recently has the text
block ddox.authorsblock ddox.copyrightblock ddox.license
visible at the bottom, and blank Authors, Copyright, License. Seems there's diet-ng template bug. :) Here's the resulting HTML, pasted from Firefox modulo indentation.
<table class="license-info"> <tr> <th>Authors</th> <td:>block ddox.authors</td:> </tr> <tr> <th>Copyright</th> <td:>block ddox.copyright</td:> </tr> <tr> <th>License</th> <td:>block ddox.license</td:> </tr> </table>