Fatal error: Uncaught Error: Class 'WP_HTML_Tag_Processor' not found in D:\HTTP\copos\web\blog\wp-includes\blocks\heading.php:27 Stack trace: #0 D:\HTTP\copos\web\blog\wp-includes\class-wp-block.php(258): block_core_heading_render(Array, '\n<h6></h6>\n', Object(WP_Block)) #1 D:\HTTP\copos\web\blog\wp-includes\blocks.php(1072): WP_Block->render() #2 D:\HTTP\copos\web\blog\wp-includes\blocks.php(1110): render_block(Array) #3 D:\HTTP\copos\web\blog\wp-includes\class-wp-hook.php(308): do_blocks('<!-- wp:image {...') #4 D:\HTTP\copos\web\blog\wp-includes\plugin.php(205): WP_Hook->apply_filters('<!-- wp:image {...', Array) #5 D:\HTTP\copos\web\blog\wp-includes\post-template.php(255): apply_filters('the_content', '<!-- wp:image {...') #6 D:\HTTP\copos\web\blog\wp-content\themes\fukasawa\singular.php(79): the_content() #7 D:\HTTP\copos\web\blog\wp-includes\template-loader.php(106): include('D:\\HTTP\\copos\\w...') #8 D:\HTTP\copos\web\blog\wp-blog-header.php(19): require_once('D:\\HTTP\\copos\\w...') #9 D:\HTTP\copos\web\blog\ind in D:\HTTP\copos\web\blog\wp-includes\blocks\heading.php on line 27