I got same message after updating WordPress. I dont have WPmail so I’ve deactivated all of them. So when I’ve activate LayerSlider I got the message again. But Layer Slider also got update suddenly!
Message has gone after I’ve updated Layer Slider…
This is the first sentence how I started to write my answer…
“Dear Adam,
Yes problem has just happened after I started to use Hummingbird. And I’m pretty sure I’ve deleted cache on WP panel, and next day web site was like that.
On the other hand, yes I’ve already checked cron.php file…
Then I decided to double check cron.php file and Oh My god! it’s not there. And I’ve uploded again and now its working 😀
thanks for your help =) heheh really You let me try double check and now it works…
Kind Regards
