See bug 49966.
Affected wikis:
'wmgUseArticleFeedback' => array(
'default' => false,
'testwiki' => true,
'eswiki' => true,
'eswikinews' => true,
'hiwiki' => true,
'huwiki' => true,
'metawiki' => true,
'ptwiki' => true,
'ptwikibooks' => true,
'srwiki' => true,
'zhwiki' => true,
),
Version: unspecified
Severity: blocker