Fatal error: Uncaught Error: Call to undefined function Automattic\Jetpack\Extensions\Subscriptions\array_merge() in /export/sd202/www/jp/r/e/gmoserver/6/2/sd0518962/himuka-tour.jp/wordpress-4.9.4-ja-jetpack_webfont-undernavicontrol/wp-content/plugins/jetpack/extensions/blocks/subscriptions/subscriptions.php:140 Stack trace: #0 /export/sd202/www/jp/r/e/gmoserver/6/2/sd0518962/himuka-tour.jp/wordpress-4.9.4-ja-jetpack_webfont-undernavicontrol/wp-includes/class-wp-hook.php(324): Automattic\Jetpack\Extensions\Subscriptions\{closure}(Array) #1 /export/sd202/www/jp/r/e/gmoserver/6/2/sd0518962/himuka-tour.jp/wordpress-4.9.4-ja-jetpack_webfont-undernavicontrol/wp-includes/plugin.php(205): WP_Hook->apply_filters(Array, Array) #2 /export/sd202/www/jp/r/e/gmoserver/6/2/sd0518962/himuka-tour.jp/wordpress-4.9.4-ja-jetpack_webfont-undernavicontrol/wp-content/plugins/jetpack/jetpack_vendor/automattic/jetpack-sync/src/class-defaults.php(794): apply_filters('jetpack_sync_po...', Array) #3 /export/sd202/www/jp/r/e/gmoserver/6/2/sd0518962/ in /export/sd202/www/jp/r/e/gmoserver/6/2/sd0518962/himuka-tour.jp/wordpress-4.9.4-ja-jetpack_webfont-undernavicontrol/wp-content/plugins/jetpack/extensions/blocks/subscriptions/subscriptions.php on line 140