Fatal error: Uncaught Error: Failed opening required '/usr/home/mw2pfd2f9s/www/htdocs/wordpress/wp-includes/class-wp-walker.php' (include_path='.:/usr/local/php-8.1/lib/php') in /usr/home/mw2pfd2f9s/www/htdocs/wordpress/wp-settings.php:163 Stack trace: #0 /usr/home/mw2pfd2f9s/www/htdocs/wordpress/wp-config.php(93): require_once() #1 /usr/home/mw2pfd2f9s/www/htdocs/wordpress/wp-load.php(50): require_once('/usr/home/mw2pf...') #2 /usr/home/mw2pfd2f9s/www/htdocs/wordpress/wp-blog-header.php(13): require_once('/usr/home/mw2pf...') #3 /usr/home/mw2pfd2f9s/www/htdocs/wordpress/index.php(17): require('/usr/home/mw2pf...') #4 {main} thrown in /usr/home/mw2pfd2f9s/www/htdocs/wordpress/wp-settings.php on line 163

Fatal error: Uncaught Error: Call to a member function set() on null in /usr/home/mw2pfd2f9s/www/htdocs/wordpress/wp-includes/l10n.php:784 Stack trace: #0 /usr/home/mw2pfd2f9s/www/htdocs/wordpress/wp-includes/l10n.php(872): load_textdomain('default', '/usr/home/mw2pf...', 'ja') #1 /usr/home/mw2pfd2f9s/www/htdocs/wordpress/wp-includes/class-wp-fatal-error-handler.php(47): load_default_textdomain() #2 [internal function]: WP_Fatal_Error_Handler->handle() #3 {main} thrown in /usr/home/mw2pfd2f9s/www/htdocs/wordpress/wp-includes/l10n.php on line 784