MediaWiki internal error.
Original exception: [253c2bfb-28cf-4967-b741-6d412143ae44] 2023-01-17 18:33:40: Fatal exception of type "ConfigException"
Exception caught inside exception handler.
Set $wgShowExceptionDetails = true; at the bottom of LocalSettings.php to show detailed debugging information.
```name=exception.trace,lines=10
from /srv/mediawiki/php-1.40.0-wmf.18/includes/config/GlobalVarConfig.php(59)
#0 /srv/mediawiki/php-1.40.0-wmf.18/extensions/DiscussionTools/includes/Hooks/HookUtils.php(340): GlobalVarConfig->get(string)
#1 /srv/mediawiki/php-1.40.0-wmf.18/extensions/DiscussionTools/includes/Hooks/HookUtils.php(414): MediaWiki\Extension\DiscussionTools\Hooks\HookUtils::isAvailableForTitle(Title, string)
#2 /srv/mediawiki/php-1.40.0-wmf.18/extensions/DiscussionTools/includes/Hooks/PageHooks.php(284): MediaWiki\Extension\DiscussionTools\Hooks\HookUtils::isFeatureEnabledForOutput(OutputPage, string)
#3 /srv/mediawiki/php-1.40.0-wmf.18/includes/HookContainer/HookContainer.php(160): MediaWiki\Extension\DiscussionTools\Hooks\PageHooks->onOutputPageBeforeHTML(OutputPage, string)
#4 /srv/mediawiki/php-1.40.0-wmf.18/includes/HookContainer/HookRunner.php(2651): MediaWiki\HookContainer\HookContainer->run(string, array)
#5 /srv/mediawiki/php-1.40.0-wmf.18/includes/OutputPage.php(2247): MediaWiki\HookContainer\HookRunner->onOutputPageBeforeHTML(OutputPage, string)
#6 /srv/mediawiki/php-1.40.0-wmf.18/includes/OutputPage.php(2259): OutputPage->addParserOutputText(ParserOutput, array)
#7 /srv/mediawiki/php-1.40.0-wmf.18/includes/page/Article.php(828): OutputPage->addParserOutput(ParserOutput, array)
#8 /srv/mediawiki/php-1.40.0-wmf.18/includes/page/Article.php(730): Article->doOutputFromRenderStatus(MediaWiki\Revision\RevisionStoreRecord, Status, OutputPage, array)
#9 /srv/mediawiki/php-1.40.0-wmf.18/includes/page/Article.php(533): Article->generateContentOutput(User, ParserOptions, integer, OutputPage, array)
#10 /srv/mediawiki/php-1.40.0-wmf.18/includes/actions/ViewAction.php(78): Article->view()
#11 /srv/mediawiki/php-1.40.0-wmf.18/includes/MediaWiki.php(551): ViewAction->show()
#12 /srv/mediawiki/php-1.40.0-wmf.18/includes/MediaWiki.php(328): MediaWiki->performAction(Article, Title)
#13 /srv/mediawiki/php-1.40.0-wmf.18/includes/MediaWiki.php(916): MediaWiki->performRequest()
#14 /srv/mediawiki/php-1.40.0-wmf.18/includes/MediaWiki.php(571): MediaWiki->main()
#15 /srv/mediawiki/php-1.40.0-wmf.18/index.php(50): MediaWiki->run()
#16 /srv/mediawiki/php-1.40.0-wmf.18/index.php(46): wfIndexMain()
#17 /srv/mediawiki/w/index.php(3): require(string)
#18 {main}
```