WordPressの開発

Uncaught Error: Call to undefined function wp_has_noncharacters()
in /home/ws1/wtpage.info/public_html/wp/wp-includes/html-api/class-wp-html-tag-processor.php on line 3957

Call stack:

1. WP_HTML_Tag_Processor::set_attribute('class', 'wp-block-list')
   wp-includes/html-api/class-wp-html-tag-processor.php:2479
2. WP_HTML_Tag_Processor::class_name_updates_to_attributes_updates()
   wp-includes/html-api/class-wp-html-tag-processor.php:4272
3. WP_HTML_Tag_Processor::get_updated_html()
   wp-includes/blocks/list.php:37
4. 
   wp-includes/class-wp-block.php:586
5. WP_Block::render()
   wp-includes/blocks.php:2359
6. render_block(array)
   wp-includes/blocks.php:2431
7. do_blocks('<!-- wp:paragraph --...-- /wp:paragraph -->')
   wp-includes/class-wp-hook.php:324
8. WP_Hook::apply_filters('<!-- wp:paragraph --...-- /wp:paragraph -->', array)
   wp-includes/plugin.php:205
9. apply_filters('the_content', '<!-- wp:paragraph --...-- /wp:paragraph -->')
   wp-content/themes/luxeritas/inc/filters.php:385
10. {closure}('<!-- wp:paragraph --...-- /wp:paragraph -->')
    wp-includes/class-wp-hook.php:324
11. WP_Hook::apply_filters('', array)
    wp-includes/plugin.php:205
12. apply_filters('thk_content', '')
    wp-content/themes/luxech/single.php:131
13. include('/home/ws1/wtpage.inf...es/luxech/single.php')
    wp-includes/template-loader.php:106
14. require_once('/home/ws1/wtpage.inf.../template-loader.php')
    wp-blog-header.php:19
15. require('/home/ws1/wtpage.inf...p/wp-blog-header.php')
    index.php:17