Warning: require(D:\www\www394/wp-includes/html-api/class-wp-html-processor.php): failed to open stream: No such file or directory in D:\www\www394\wp-settings.php on line 260

Fatal error: require(): Failed opening required 'D:\www\www394/wp-includes/html-api/class-wp-html-processor.php' (include_path='.;C:\Program Files\PHP\v7.4\pear') in D:\www\www394\wp-settings.php on line 260

Fatal error: Uncaught Error: Call to a member function set() on null in D:\www\www394\wp-includes\l10n.php:854
Stack trace:
#0 D:\www\www394\wp-includes\l10n.php(957): load_textdomain()
#1 D:\www\www394\wp-includes\class-wp-fatal-error-handler.php(49): load_default_textdomain()
#2 [internal function]: WP_Fatal_Error_Handler->handle()
#3 {main}
  thrown in D:\www\www394\wp-includes\l10n.php on line 854