Fatal error: Uncaught Error: Class 'WP_CLI_Command' not found in /home/frassati/public_html/wp-content/plugins/cornerstone/includes/classes/WpCli/Commands.php:5 Stack trace: #0 {main} thrown in /home/frassati/public_html/wp-content/plugins/cornerstone/includes/classes/WpCli/Commands.php on line 5