Cant find cpt “event”

I use the plugin “Events Manager” and I would use the CPT “event” from this. But I can’t find this entry in “campaign” – “Wähle individuelle Inhaltstyp(en)
(Optional) Wähle die individuellen Inhaltstypen, für die Benachrichtigungen versendet werden sollen.”

Has someone any Idea, what can be the cause?

I use the follow function

function my_post_types($types) {
$types[] = ‘events’;
return $types;
}

Many thanks …
Jörg