[{reqId}] {exception_url}   DomainException: HTMLForm::getField: no field named discussiontools-newtopictool

from /srv/mediawiki/php-1.39.0-wmf.15/includes/htmlform/HTMLForm.php(444)
#0 /srv/mediawiki/php-1.39.0-wmf.15/includes/htmlform/HTMLFormField.php(145): HTMLForm->getField(string)
#1 /srv/mediawiki/php-1.39.0-wmf.15/includes/htmlform/HTMLFormField.php(160): HTMLFormField->getNearestField(string, boolean)
#2 /srv/mediawiki/php-1.39.0-wmf.15/includes/htmlform/HTMLFormField.php(277): HTMLFormField->getNearestFieldValue(array, string, boolean, boolean)
#3 /srv/mediawiki/php-1.39.0-wmf.15/includes/htmlform/HTMLFormField.php(367): HTMLFormField->checkStateRecurse(array, array)
#4 /srv/mediawiki/php-1.39.0-wmf.15/includes/htmlform/HTMLForm.php(2065): HTMLFormField->isDisabled(array)
#5 /srv/mediawiki/php-1.39.0-wmf.15/includes/htmlform/HTMLForm.php(577): HTMLForm->loadFieldData()
#6 /srv/mediawiki/php-1.39.0-wmf.15/includes/htmlform/HTMLForm.php(629): HTMLForm->prepareForm()
#7 /srv/mediawiki/php-1.39.0-wmf.15/includes/specials/SpecialPreferences.php(121): HTMLForm->show()
#8 /srv/mediawiki/php-1.39.0-wmf.15/includes/specialpage/SpecialPage.php(688): SpecialPreferences->execute(NULL)
#9 /srv/mediawiki/php-1.39.0-wmf.15/includes/specialpage/SpecialPageFactory.php(1415): SpecialPage->run(NULL)
#10 /srv/mediawiki/php-1.39.0-wmf.15/includes/MediaWiki.php(316): MediaWiki\SpecialPage\SpecialPageFactory->executePath(string, RequestContext)
#11 /srv/mediawiki/php-1.39.0-wmf.15/includes/MediaWiki.php(916): MediaWiki->performRequest()
#12 /srv/mediawiki/php-1.39.0-wmf.15/includes/MediaWiki.php(570): MediaWiki->main()
#13 /srv/mediawiki/php-1.39.0-wmf.15/index.php(50): MediaWiki->run()
#14 /srv/mediawiki/php-1.39.0-wmf.15/index.php(46): wfIndexMain()
#15 /srv/mediawiki/w/index.php(3): require(string)
#16 {main}