The following scheduled event failed to run

WP Rocket will display a notice if scheduled events are not running as expected. This can indicate that cron may not be working properly on your site.

In some cases, this could be a false positive if the event just runs a little later than expected. 

If you see this notice in your admin, please check the following:

• Setting up a cron job on your server is the most reliable way to run scheduled events. Find out how to do that in our guide.
• If you have already disabled wp-cron in your wp-config.php file, make sure it has been replaced with a server cron, as mentioned in the guide above.
• If you have done these things but are seeing the notice anyway, please contact your host to check if and why cron is not working as expected.