Fatal error: Uncaught Error: Failed opening required '/home/naijalan/public_html/wp-admin/includes/class-wp-upgrader.php' (include_path='.:/opt/cpanel/ea-php80/root/usr/share/pear') in /home/naijalan/public_html/wp-content/plugins/classic-editor-addon/vendor/afragen/wp-dependency-installer/wp-dependency-installer.php:823 Stack trace: #0 /home/naijalan/public_html/wp-content/plugins/classic-editor-addon/vendor/composer/ClassLoader.php(444): include() #1 /home/naijalan/public_html/wp-content/plugins/classic-editor-addon/vendor/composer/ClassLoader.php(322): Composer\Autoload\includeFile('/home/naijalan/...') #2 /home/naijalan/public_html/wp-content/plugins/classic-editor-addon/classic-editor-addon.php(30): Composer\Autoload\ClassLoader->loadClass('WP_Dependency_I...') #3 /home/naijalan/public_html/wp-settings.php(391): include_once('/home/naijalan/...') #4 /home/naijalan/public_html/wp-config.php(102): require_once('/home/naijalan/...') #5 /home/naijalan/public_html/wp-load.php(37): require_once('/home/naijalan/...') #6 /home/naijalan/public_html/wp-blog-header.php(13): require_once('/home/naijalan/...') #7 /home/naijalan/public_html/index.php(17): require('/home/naijalan/...') #8 {main} thrown in /home/naijalan/public_html/wp-content/plugins/classic-editor-addon/vendor/afragen/wp-dependency-installer/wp-dependency-installer.php on line 823