The following two strings are missing on the latest version (Discourse 2.3.0.beta5).
1. requestedUrl: "/admin/customize/site_texts/user_notifications.confirm_old_email.subject_template"
2. responseJSON: {errors: Array(1), error_type: "not_found"}
3. responseText: "{"errors":["The requested URL or resource could not be found."],"error_type":"not_found"}"
1. requestedUrl: "/admin/customize/site_texts/user_notifications.confirm_old_email.subject_template"
2. responseJSON: {errors: Array(1), error_type: "not_found"}
3. responseText: "{"errors":["The requested URL or resource could not be found."],"error_type":"not_found"}"