Seen in logstash:
Warning: wfAjaxCollectionSetTitles() expects at least 2 parameters, 1 given in /srv/mediawiki/php-1.32.0-wmf.19/extensions/Collection/Collection.php on line 446 5 [{exception_id}] {exception_url} ErrorException from line 446 of /srv/mediawiki/php-1.32.0-wmf.19/extensions/Collection/Collection.php: PHP Warning: wfAjaxCollectionSetTitles() expects at least 2 parameters, 1 given