If I visit https://wikitech.wikimedia.org/wiki/Special:Notifications,
I get every time an exception "InvalidArgumentException"
trace:
#0 /srv/mediawiki/php-1.32.0-wmf.3/extensions/Echo/includes/formatters/SpecialNotificationsFormatter.php(111): EchoIcon::getUrl(string, string) #1 /srv/mediawiki/php-1.32.0-wmf.3/extensions/Echo/includes/formatters/SpecialNotificationsFormatter.php(18): SpecialNotificationsFormatter->getIconURL(EchoOpenStackManagerPresentationModel) #2 /srv/mediawiki/php-1.32.0-wmf.3/extensions/Echo/includes/formatters/EchoEventFormatter.php(63): SpecialNotificationsFormatter->formatModel(EchoOpenStackManagerPresentationModel) #3 /srv/mediawiki/php-1.32.0-wmf.3/extensions/Echo/includes/DataOutputFormatter.php(171): EchoEventFormatter->format(EchoEvent) #4 /srv/mediawiki/php-1.32.0-wmf.3/extensions/Echo/includes/DataOutputFormatter.php(136): EchoDataOutputFormatter::formatNotification(EchoEvent, User, string, LanguageEn) #5 /srv/mediawiki/php-1.32.0-wmf.3/extensions/Echo/includes/special/SpecialNotifications.php(59): EchoDataOutputFormatter::formatOutput(EchoNotification, string, User, LanguageEn) #6 /srv/mediawiki/php-1.32.0-wmf.3/includes/specialpage/SpecialPage.php(522): SpecialNotifications->execute(NULL) #7 /srv/mediawiki/php-1.32.0-wmf.3/includes/specialpage/SpecialPageFactory.php(568): SpecialPage->run(NULL) #8 /srv/mediawiki/php-1.32.0-wmf.3/includes/MediaWiki.php(288): SpecialPageFactory::executePath(Title, RequestContext) #9 /srv/mediawiki/php-1.32.0-wmf.3/includes/MediaWiki.php(861): MediaWiki->performRequest() #10 /srv/mediawiki/php-1.32.0-wmf.3/includes/MediaWiki.php(524): MediaWiki->main() #11 /srv/mediawiki/php-1.32.0-wmf.3/index.php(42): MediaWiki->run() #12 /srv/mediawiki/w/index.php(3): include(string) #13 {main}