Delivery Engine Not Trigering

Since last WordPress update (4.4) there have been a couple of issues with Newsletter.

1.) The Delivery Engine has stopped auto Triggering, I have to manually trigger it.

2.) Get an error message about the cron “The cron system seems not running correctly. See this page for more information.”

With number 2 I have tried an outside cron service and also followed Hostgators advice here http://support.hostgator.com/articles/specialized-help/technical/wordpress/how-to-replace-wordpress-cron-with-a-real-cron-job

But still have both problems?

https://ww.wp.xz.cn/plugins/newsletter/