Fatal error: Uncaught Error: Class 'WP_REST_Controller' not found in /home/vienngo/domains/vienngo.com/public_html/wp-content/plugins/wordpress-popular-posts/src/Rest/Endpoint.php:6 Stack trace: #0 /home/vienngo/domains/vienngo.com/public_html/wp-content/plugins/ht-mega-for-elementor/htmega-blocks/vendor/composer/ClassLoader.php(571): include() #1 /home/vienngo/domains/vienngo.com/public_html/wp-content/plugins/ht-mega-for-elementor/htmega-blocks/vendor/composer/ClassLoader.php(428): Composer\Autoload\includeFile() #2 [internal function]: Composer\Autoload\ClassLoader->loadClass() #3 /home/vienngo/domains/vienngo.com/public_html/wp-content/plugins/wordpress-popular-posts/src/Rest/PostsEndpoint.php(7): spl_autoload_call() #4 /home/vienngo/domains/vienngo.com/public_html/wp-content/plugins/ht-mega-for-elementor/htmega-blocks/vendor/composer/ClassLoader.php(571): include('/home/vienngo/d...') #5 /home/vienngo/domains/vienngo.com/public_html/wp-content/plugins/ht-mega-for-elementor/htmega-blocks/vendor/composer/ClassLoader.ph in /home/vienngo/domains/vienngo.com/public_html/wp-content/plugins/wordpress-popular-posts/src/Rest/Endpoint.php on line 6