Fatal error: Uncaught Error: Call to undefined function Rocket\Async\CSS\Integration\wp_is_xml_request() in /var/www/greenparty.ie/wp-content/plugins/rocket-async-css/lib/Rocket/Async/CSS/Integration/ResponsiveImages.php:53 Stack trace: #0 /var/www/greenparty.ie/wp-includes/class-wp-hook.php(286): Rocket\Async\CSS\Integration\ResponsiveImages->wp_loaded(Object(WP)) #1 /var/www/greenparty.ie/wp-includes/class-wp-hook.php(310): WP_Hook->apply_filters(NULL, Array) #2 /var/www/greenparty.ie/wp-includes/plugin.php(531): WP_Hook->do_action(Array) #3 /var/www/greenparty.ie/wp-includes/class-wp.php(750): do_action_ref_array('wp', Array) #4 /var/www/greenparty.ie/wp-includes/functions.php(1105): WP->main('') #5 /var/www/greenparty.ie/wp-blog-header.php(16): wp() #6 /var/www/greenparty.ie/index.php(17): require('/var/www/greenp...') #7 {main} thrown in /var/www/greenparty.ie/wp-content/plugins/rocket-async-css/lib/Rocket/Async/CSS/Integration/ResponsiveImages.php on line 53