Fatal error: Uncaught Error: Class 'WP_Theme_JSON_Resolver' not found in /home/users/0/harch2015/web/harch.jp/wp-includes/script-loader.php:1530 Stack trace: #0 /home/users/0/harch2015/web/harch.jp/wp-includes/class-wp-hook.php(303): wp_default_styles(Object(WP_Styles)) #1 /home/users/0/harch2015/web/harch.jp/wp-includes/class-wp-hook.php(327): WP_Hook->apply_filters('', Array) #2 /home/users/0/harch2015/web/harch.jp/wp-includes/plugin.php(518): WP_Hook->do_action(Array) #3 /home/users/0/harch2015/web/harch.jp/wp-includes/class.wp-styles.php(135): do_action_ref_array('wp_default_styl...', Array) #4 /home/users/0/harch2015/web/harch.jp/wp-includes/functions.wp-styles.php(24): WP_Styles->__construct() #5 /home/users/0/harch2015/web/harch.jp/wp-content/plugins/polylang-pro/vendor/wpsyntex/polylang/frontend/choose-lang.php(67): wp_styles() #6 /home/users/0/harch2015/web/harch.jp/wp-content/plugins/polylang-pro/vendor/wpsyntex/polylang/frontend/choose-lang-url.php(71): PLL_Choose_Lang->set_language(Object(PLL_Language)) #7 /ho in /home/users/0/harch2015/web/harch.jp/wp-includes/script-loader.php on line 1530