I'm looking at our server logs and a notice keeps coming up, originating from your plugin.
On \wp-content\plugins\woocommerce-email-control\ec-email-control.php line 367 you appear to have get_currentuserinfo(); and that throws
PHP Notice: get_currentuserinfo is <strong>deprecated</strong> since version 4.5.0! Use wp_get_current_user() instead.
Can you have a look at this please?