A 500 is returned from zero.wikimedia.org for any request for a page in the Zero namespace.
PHP Fatal Error from line 734 of /srv/mediawiki/php-1.32.0-wmf.18/extensions/JsonConfig/includes/JCSingleton.php: Call to undefined method ZeroBanner\ZeroConfig::getLicenseObject()
{ "fatal_exception": { "class":"ErrorException", "message":"PHP Fatal Error: Call to undefined method ZeroBanner\\ZeroConfig::getLicenseObject()", "code":16777217, "file":"/srv/mediawiki/php-1.32.0-wmf.18/extensions/JsonConfig/includes/JCSingleton.php", "line":734, "trace":"#0 /srv/mediawiki/php-1.32.0-wmf.18/extensions/JsonConfig/includes/JCSingleton.php(734): NO_FUNCTION_GIVEN() } }
[721897cd88e5c4299cfcf548] /wiki/Zero:Foo Error from line 734 of /vagrant/mediawiki/extensions/JsonConfig/includes/JCSingleton.php: Call to undefined method ZeroBanner\ZeroConfig::getLicenseObject() Backtrace: #0 /vagrant/mediawiki/extensions/JsonConfig/includes/JCSingleton.php(824): JsonConfig\JCSingleton::getTitleLicenseCode(JsonConfig\JCTitle) #1 /vagrant/mediawiki/includes/Hooks.php(174): JsonConfig\JCSingleton::onSkinCopyrightFooter(Title, string, string, string, boolean) #2 /vagrant/mediawiki/includes/Hooks.php(202): Hooks::callHook(string, array, array, NULL) #3 /vagrant/mediawiki/includes/skins/Skin.php(855): Hooks::run(string, array) #4 /vagrant/mediawiki/includes/skins/SkinTemplate.php(397): Skin->getCopyright() #5 /vagrant/mediawiki/includes/skins/SkinTemplate.php(225): SkinTemplate->prepareQuickTemplate() #6 /vagrant/mediawiki/includes/OutputPage.php(2406): SkinTemplate->outputPage() #7 /vagrant/mediawiki/includes/MediaWiki.php(875): OutputPage->output(boolean) #8 /vagrant/mediawiki/includes/MediaWiki.php(887): MediaWiki->{closure}() #9 /vagrant/mediawiki/includes/MediaWiki.php(525): MediaWiki->main() #10 /vagrant/mediawiki/index.php(42): MediaWiki->run() #11 /var/www/w/index.php(5): require(string) #12 {main}