Fatal error: Uncaught Error: Interface 'Psr\Http\Message\ServerRequestInterface' not found in /var/www/courses.riftvalley.net/wordpress/wp-content/plugins/depicter/vendor/averta/wpemerge/src/Requests/RequestInterface.php:17 Stack trace: #0 {main} thrown in /var/www/courses.riftvalley.net/wordpress/wp-content/plugins/depicter/vendor/averta/wpemerge/src/Requests/RequestInterface.php on line 17