Special:Badtitle/NS90:Forum:Tech Wishlist And Bug Reports/Talk pages with talk on them are broken

Some talk pages are broken and give the following error when I attempt to access them:

Catchable fatal error: Argument 1 passed to Title::equals must be an instance of Title, null given, called in /srv/mediawiki/w/extensions/LiquidThreads/classes/Thread.php on line 913 and defined in /srv/mediawiki/w/includes/Title.php on line 4220

As far as I can determine, the error only occurs on talk pages that aren't empty. (By the way, I would have suggested for Bludgeon Blade to be launched. There are more than enough examples.)