Fatal error: Uncaught Error: Interface 'Themeco\Cornerstone\Documents\IDocumentSettings' not found in /home/frassati/public_html/wp-content/plugins/cornerstone/includes/classes/Documents/SettingsFragment.php:5 Stack trace: #0 {main} thrown in /home/frassati/public_html/wp-content/plugins/cornerstone/includes/classes/Documents/SettingsFragment.php on line 5