== Error Message ==
/wiki/Special:UnusedFiles MWException from line 167 of /srv/mediawiki/php-1.32.0-wmf.3/includes/Hooks.php: Invalid callback Wikibase\LibHooks::onGalleryGetModes in hooks for GalleryGetModes
== Stack Trace ==
```
#0 /srv/mediawiki/php-1.32.0-wmf.3/includes/Hooks.php(205): Hooks::callHook(string, array, array, NULL)
#1 /srv/mediawiki/php-1.32.0-wmf.3/includes/gallery/ImageGalleryBase.php(133): Hooks::run(string, array)
#2 /srv/mediawiki/php-1.32.0-wmf.3/includes/gallery/ImageGalleryBase.php(103): ImageGalleryBase::loadModes()
#3 /srv/mediawiki/php-1.32.0-wmf.3/includes/specialpage/ImageQueryPage.php(48): ImageGalleryBase::factory(boolean, RequestContext)
#4 /srv/mediawiki/php-1.32.0-wmf.3/includes/specialpage/QueryPage.php(671): ImageQueryPage->outputResults(OutputPage, SkinVector, Wikimedia\Rdbms\DatabaseMysqli, Wikimedia\Rdbms\ResultWrapper, integer, integer)
#5 /srv/mediawiki/php-1.32.0-wmf.3/includes/specialpage/SpecialPage.php(522): QueryPage->execute(NULL)
#6 /srv/mediawiki/php-1.32.0-wmf.3/includes/specialpage/SpecialPageFactory.php(568): SpecialPage->run(NULL)
#7 /srv/mediawiki/php-1.32.0-wmf.3/includes/MediaWiki.php(288): SpecialPageFactory::executePath(Title, RequestContext)
#8 /srv/mediawiki/php-1.32.0-wmf.3/includes/MediaWiki.php(861): MediaWiki->performRequest()
#9 /srv/mediawiki/php-1.32.0-wmf.3/includes/MediaWiki.php(524): MediaWiki->main()
#10 /srv/mediawiki/php-1.32.0-wmf.3/index.php(42): MediaWiki->run()
#11 /srv/mediawiki/w/index.php(3): include(string)
#12 {main}
```
== Notes ==
|file|[[ /source/mediawiki/browse/master/includes/Hooks.php;9114fbfdaea90a092c42b2530a6995a56449e69d$167 | /srv/mediawiki/php-1.32.0-wmf.3/includes/Hooks.php:167 ]]|
|url|https://en.wikibooks.org/wiki/Special:UnusedFiles|