Thread:Extension talk:Collection/License: unknown in PDFs/reply

I tried setting: $wgLicenseName = null; $wgLicenseURL = null;

As I have the following configured: $wgRightsUrl = "http://creativecommons.org/licenses/by-sa/3.0/"; $wgRightsText = "Creative Commons Attribution-ShareAlike";

According to the ReadMe in the Collections source tree, the license should default to the Rights text in this case. It doesn't. Rendered PDFs and Books still have a License: unknown.