The latest one. my plugins are always up-to-date. anyway I fixed it by commenting out these lines in email-subscribers/job/es-subscribe.php. I think there is something wrong with these two lines. $_SERVER[‘HTTP_REFERER’] is searched for the value in $homeurl, and strpos returns its position if found ,but it’s not found and therefore IF condition is not met ,so it takes the user to the else part where they are thrown “unexpected-error” error. I hope it will be fixed in the next version. thanks.
$homeurl = home_url();
$samedomain = strpos($_SERVER['HTTP_REFERER'], $homeurl);
//if (($samedomain !== false) && $samedomain < 5)
//{
//}
//else
//{
// echo "unexpected-error";
//}