Uncaught Error: mysqli_num_fields(): Argument #1 ($result) must be of type mysqli_result, false given
in /home/xs88315/kouhoukai.co.jp/public_html/wp-includes/class-wpdb.php on line 3876

Call stack:

1. mysqli_num_fields(false)
   wp-includes/class-wpdb.php:3876
2. wpdb::load_col_info()
   wp-includes/class-wpdb.php:785
3. wpdb::__get('col_info')
   wp-content/plugins/w3-total-cache/DbCache_WpdbInjection_QueryCaching.php:230
4. W3TC\DbCache_WpdbInjection_QueryCaching::query('SELECT * FROM wp_red...enabled' LIMIT 20000')
   wp-content/plugins/w3-total-cache/DbCache_WpdbNew.php:216
5. W3TC\DbCache_WpdbNew::query('SELECT * FROM wp_red...enabled' LIMIT 20000')
   wp-includes/class-wpdb.php:3156
6. wpdb::get_results('SELECT * FROM wp_red...enabled' LIMIT 20000')
   wp-content/plugins/redirection/models/redirect/redirect.php:434
7. Red_Item::get_for_matched_url(Red_Url_Match)
   wp-content/plugins/redirection/models/redirect/redirect.php:409
8. Red_Item::get_for_url('/wp-sitemap.xml')
   wp-content/plugins/redirection/modules/wordpress.php:333
9. WordPress_Module::init('')
   wp-includes/class-wp-hook.php:341
10. WP_Hook::apply_filters(NULL, array)
    wp-includes/class-wp-hook.php:365
11. WP_Hook::do_action(array)
    wp-includes/plugin.php:522
12. do_action('init')
    wp-settings.php:742
13. require_once('/home/xs88315/kouhou...html/wp-settings.php')
    wp-config.php:100
14. require_once('/home/xs88315/kouhou...c_html/wp-config.php')
    wp-load.php:50
15. require_once('/home/xs88315/kouhou...lic_html/wp-load.php')
    wp-blog-header.php:13
16. require('/home/xs88315/kouhou...l/wp-blog-header.php')
    index.php:17