Error en file_get_contents

Me aparece este error cuando activo el plugin:

Warning: file_get_contents(https://www.anyda.xyz/destino): failed to open stream: Connection timed out in …/public_html/wp-content/plugins/calculo-de-despacho-via-starken-para-woocommerce/calculo-starken-woocommerce.php on line 307