User Brunter from ru.wikipedia reports an error in the notification
https://ru.wikipedia.org/w/index.php?title=Википедия:Форум/Технический&oldid=77032299#.D0.9E.D1.88.D0.B8.D0.B1.D0.BA.D0.B0_.D0.B2_.D1.83.D0.B2.D0.B5.D0.B4.D0.BE.D0.BC.D0.BB.D0.B5.D0.BD.D0.B8.D1.8F.D1.85
"The day after the registration of such a thing happened.
If you click on "All Notifications", the following text is displayed: Exception encountered, of type "BadMethodCallException". In other language this error is not displayed"
2016-03-09 20:47:46 mw1136 ruwiki 1.27.0-wmf.15 exception ERROR: [fcc5f9ba] /w/api.php?action=query&format=json¬sections=alert&meta=notifications¬groupbysection=1¬messageunreadfirst=1¬format=model¬limit=25¬prop=index|list|count&uselang=ru&_=1457556461287 BadMethodCallException from line 15 of /srv/mediawiki/php-1.27.0-wmf.15/extensions/Echo/includes/formatters/EditThresholdPresentationModel.php: Call to a member function getLocalURL() on a non-object (NULL) {"exception_id":"fcc5f9ba"} [Exception BadMethodCallException] (/srv/mediawiki/php-1.27.0-wmf.15/extensions/Echo/includes/formatters/EditThresholdPresentationModel.php:15) Call to a member function getLocalURL() on a non-object (NULL) #0 /srv/mediawiki/php-1.27.0-wmf.15/extensions/Echo/includes/formatters/EventPresentationModel.php(371): EchoEditThresholdPresentationModel->getPrimaryLink() #1 /srv/mediawiki/php-1.27.0-wmf.15/extensions/Echo/includes/formatters/EchoModelFormatter.php(13): EchoEventPresentationModel->jsonSerialize() #2 /srv/mediawiki/php-1.27.0-wmf.15/extensions/Echo/includes/formatters/EchoEventFormatter.php(30): EchoModelFormatter->formatModel(EchoEditThresholdPresentationModel) #3 /srv/mediawiki/php-1.27.0-wmf.15/extensions/Echo/includes/DataOutputFormatter.php(142): EchoEventFormatter->format(EchoEvent) #4 /srv/mediawiki/php-1.27.0-wmf.15/extensions/Echo/includes/DataOutputFormatter.php(117): EchoDataOutputFormatter::formatNotification(EchoEvent, User, string, LanguageRu) #5 /srv/mediawiki/php-1.27.0-wmf.15/extensions/Echo/includes/api/ApiEchoNotifications.php(219): EchoDataOutputFormatter::formatOutput(EchoNotification, string, User, LanguageRu) #6 /srv/mediawiki/php-1.27.0-wmf.15/extensions/Echo/includes/api/ApiEchoNotifications.php(129): ApiEchoNotifications->getPropList(User, array, array, integer, NULL, string, boolean) #7 /srv/mediawiki/php-1.27.0-wmf.15/extensions/Echo/includes/api/ApiEchoNotifications.php(49): ApiEchoNotifications->getSectionPropList(User, string, array, integer, NULL, string, boolean) #8 /srv/mediawiki/php-1.27.0-wmf.15/includes/api/ApiQuery.php(277): ApiEchoNotifications->execute() #9 /srv/mediawiki/php-1.27.0-wmf.15/includes/api/ApiMain.php(1359): ApiQuery->execute() #10 /srv/mediawiki/php-1.27.0-wmf.15/includes/api/ApiMain.php(462): ApiMain->executeAction() #11 /srv/mediawiki/php-1.27.0-wmf.15/includes/api/ApiMain.php(433): ApiMain->executeActionWithErrorHandling() #12 /srv/mediawiki/php-1.27.0-wmf.15/api.php(83): ApiMain->execute() #13 /srv/mediawiki/w/api.php(3): include(string) #14 {main}