WordPress has a built-in feature that detects when a plugin or theme causes a fatal error on your site, and notifies you with this automated email.
In this case, WordPress caught an error with one of your plugins, Jetpack.
First, visit your website (https://www.rononeal.com) and check for any visible issues. Next, visit the page where the error was caught (https://www.rononeal.com/wp-cron.php?doing_wp_ cron=1687943904.30149507522 and check for visible issues.
Website appears to be ok when accessing it. Dashboard of course doesn’t work. When accessing the link for the page where the error was caught I got the following error message: Internal Server Error. The server encountered an internal or misconfiguration and was unable to complete your request. Please contact the server administrator and inform them of the time the error occurred, and anything you may have done that may have caused the error. More information about this error may be available in the server error log.
Again, I cannot access dashboard items, my control panel, FTP. Some time before this I upgraded PHP to 7.4