Fatal error: Uncaught Error: Interface 'Stringable' not found in /var/www/courses.riftvalley.net/wordpress/wp-content/plugins/depicter/vendor/symfony/string/AbstractString.php:30 Stack trace: #0 {main} thrown in /var/www/courses.riftvalley.net/wordpress/wp-content/plugins/depicter/vendor/symfony/string/AbstractString.php on line 30