SUB-528 [SubscriptionWebSocket] application permission is required for [WebSocket]

In the settings for the app I have "Webhook Subscriptions" checked, but all I get is application permission denied. I am missing something and I do not know what. Can some one point me in the correct direction.

var bodyParams = new CreateSubscriptionRequest();
bodyParams.eventFilters = new[] { "/restapi/v1.0/account/~/extension/101/presence?detailedTelephonyState=true" };
bodyParams.deliveryMode = new NotificationDeliveryModeRequest()
{
transportType = "WebSocket",
address = "ws://127.0.0.1:7890",

};
bodyParams.expiresIn = 3600;
var resp = await _restClient.Restapi().Subscription().Post(bodyParams);