Fatal error: Uncaught Error: Call to undefined function add_action() in /home/users2/a/aeris/www/miyablog/wp-content/plugins/jetpack/modules/custom-css/custom-css.php:1856 Stack trace: #0 {main} thrown in /home/users2/a/aeris/www/miyablog/wp-content/plugins/jetpack/modules/custom-css/custom-css.php on line 1856