Trying to create User:Lucas Werkmeister/sandbox yields the following error:
[YAS7hawQBHcAAGsf4QYAAAAN] /w/index.php?title=User:Lucas_Werkmeister/sandbox&action=submit TypeError: Argument 1 passed to MediaWiki\Extension\AbuseFilter\FilterRunner::checkFilter() must be an instance of MediaWiki\Extension\AbuseFilter\Filter\ExistingFilter, instance of MediaWiki\Extension\AbuseFilter\Filter\Filter given, called in /srv/mediawiki/php-master/extensions/AbuseFilter/includes/FilterRunner.php on line 436
Backtrace:
from /srv/mediawiki/php-master/extensions/AbuseFilter/includes/FilterRunner.php(454)
#0 /srv/mediawiki/php-master/extensions/AbuseFilter/includes/FilterRunner.php(436): MediaWiki\Extension\AbuseFilter\FilterRunner->checkFilter(MediaWiki\Extension\AbuseFilter\Filter\Filter, boolean)
#1 /srv/mediawiki/php-master/extensions/AbuseFilter/includes/FilterRunner.php(249): MediaWiki\Extension\AbuseFilter\FilterRunner->checkAllFilters(boolean)
#2 /srv/mediawiki/php-master/extensions/AbuseFilter/includes/AbuseFilterHooks.php(232): MediaWiki\Extension\AbuseFilter\FilterRunner->run()
#3 /srv/mediawiki/php-master/extensions/AbuseFilter/includes/AbuseFilterHooks.php(176): MediaWiki\Extension\AbuseFilter\AbuseFilterHooks::filterEdit(DerivativeContext, User, WikitextContent, string, string)
#4 /srv/mediawiki/php-master/includes/HookContainer/HookContainer.php(333): MediaWiki\Extension\AbuseFilter\AbuseFilterHooks::onEditFilterMergedContent(DerivativeContext, WikitextContent, Status, string, User, boolean)
#5 /srv/mediawiki/php-master/includes/HookContainer/HookContainer.php(140): MediaWiki\HookContainer\HookContainer->callLegacyHook(string, array, array, array)
#6 /srv/mediawiki/php-master/includes/HookContainer/HookRunner.php(1552): MediaWiki\HookContainer\HookContainer->run(string, array)
#7 /srv/mediawiki/php-master/includes/editpage/Constraint/EditFilterMergedContentHookConstraint.php(90): MediaWiki\HookContainer\HookRunner->onEditFilterMergedContent(DerivativeContext, WikitextContent, Status, string, User, boolean)
#8 /srv/mediawiki/php-master/includes/editpage/Constraint/EditConstraintRunner.php(88): MediaWiki\EditPage\Constraint\EditFilterMergedContentHookConstraint->checkConstraint()
#9 /srv/mediawiki/php-master/includes/EditPage.php(2084): MediaWiki\EditPage\Constraint\EditConstraintRunner->checkConstraints()
#10 /srv/mediawiki/php-master/includes/EditPage.php(1687): EditPage->internalAttemptSave(NULL, boolean)
#11 /srv/mediawiki/php-master/includes/EditPage.php(662): EditPage->attemptSave(NULL)
#12 /srv/mediawiki/php-master/includes/actions/EditAction.php(71): EditPage->edit()
#13 /srv/mediawiki/php-master/includes/actions/SubmitAction.php(38): EditAction->show()
#14 /srv/mediawiki/php-master/includes/MediaWiki.php(532): SubmitAction->show()
#15 /srv/mediawiki/php-master/includes/MediaWiki.php(316): MediaWiki->performAction(Article, Title)
#16 /srv/mediawiki/php-master/includes/MediaWiki.php(944): MediaWiki->performRequest()
#17 /srv/mediawiki/php-master/includes/MediaWiki.php(548): MediaWiki->main()
#18 /srv/mediawiki/php-master/index.php(53): MediaWiki->run()
#19 /srv/mediawiki/php-master/index.php(46): wfIndexMain()
#20 /srv/mediawiki/w/index.php(3): require(string)
#21 {main}API requests to edit structured data likewise fail. They still worked yesterday (more specifically on this test run).