Use of SkinTemplateNavigation hook (used in AttachmentsHooks::onSkinTemplateNavigation) was deprecated in MediaWiki 1.39. [Called from MediaWiki\HookContainer\HookContainer::run in /var/www/html/includes/HookContainer/HookContainer.php at line 137]

Backtrace:

MWDebug.php line 387 calls wfBacktrace()
MWDebug.php line 352 calls MWDebug::sendRawDeprecated()
MWDebug.php line 233 calls MWDebug::deprecatedMsg()
GlobalFunctions.php line 765 calls MWDebug::deprecated()
HookContainer.php line 334 calls wfDeprecated()
HookContainer.php line 137 calls MediaWiki\HookContainer\HookContainer->callLegacyHook()
HookRunner.php line 3524 calls MediaWiki\HookContainer\HookContainer->run()
SkinTemplate.php line 1195 calls MediaWiki\HookContainer\HookRunner->onSkinTemplateNavigation()
SkinTemplate.php line 1574 calls SkinTemplate->runOnSkinTemplateNavigationHooks()
SkinTemplate.php line 790 calls SkinTemplate->buildContentNavigationUrlsInternal()
SkinTemplate.php line 762 calls SkinTemplate->getPortletsTemplateData()
Skin.php line 667 calls SkinTemplate->getCategoryLinks()
SkinTemplate.php line 259 calls Skin->getCategories()
Chameleon.php line 111 calls SkinTemplate->prepareQuickTemplate()
SkinTemplate.php line 146 calls Skins\Chameleon\Chameleon->prepareQuickTemplate()
SkinTemplate.php line 177 calls SkinTemplate->generateHTML()
OutputPage.php line 2876 calls SkinTemplate->outputPage()
MediaWiki.php line 922 calls OutputPage->output()
MediaWiki.php line 562 calls MediaWiki->main()
index.php line 50 calls MediaWiki->run()
index.php line 46 calls wfIndexMain()

MediaWiki:Uploadstash-exception