Fatal error: Uncaught Error: Interface 'Psr\SimpleCache\CacheInterface' not found in /var/www/courses.riftvalley.net/wordpress/wp-content/plugins/depicter/vendor/averta/wordpress/src/Cache/WPCache.php:9 Stack trace: #0 {main} thrown in /var/www/courses.riftvalley.net/wordpress/wp-content/plugins/depicter/vendor/averta/wordpress/src/Cache/WPCache.php on line 9