Fatal error: Uncaught Error: Call to undefined function is_plugin_active() in /home/ogitomugi/www/ogitomugijp/wproot/wp-content/plugins/woocommerce-for-japan/woocommerce-for-japan.php:178
Stack trace:
#0 /home/ogitomugi/www/ogitomugijp/wproot/wp-content/plugins/woocommerce-for-japan/woocommerce-for-japan.php(110): JP4WC->includes()
#1 /home/ogitomugi/www/ogitomugijp/wproot/wp-includes/class-wp-hook.php(308): JP4WC->on_plugins_loaded('')
#2 /home/ogitomugi/www/ogitomugijp/wproot/wp-includes/class-wp-hook.php(332): WP_Hook->apply_filters(Object(WPMailSMTP\ConnectionsManager), Array)
#3 /home/ogitomugi/www/ogitomugijp/wproot/wp-includes/plugin.php(517): WP_Hook->do_action(Array)
#4 /home/ogitomugi/www/ogitomugijp/wproot/wp-settings.php(486): do_action('plugins_loaded')
#5 /home/ogitomugi/www/ogitomugijp/wproot/wp-config.php(71): require_once('/home/ogitomugi...')
#6 /home/ogitomugi/www/ogitomugijp/wproot/wp-load.php(50): require_once('/home/ogitomugi...')
#7 /home/ogitomugi/www/ogitomugijp/wproot/wp-blog-header.php(13): requ in /home/ogitomugi/www/ogitomugijp/wproot/wp-content/plugins/woocommerce-for-japan/woocommerce-for-japan.php on line 178