With update SEO 2.0.30 and 2.0.31 i have error.
here my log
2016/03/02 09:04:20 [error] 492#0: *22989875 FastCGI sent in stderr: "PHP message: PHP Warning: require_once(DIR/dbtech/dbseo/includes/3rdparty/portable-utf8/voku/helper/UTF8.php): failed to open stream: No such file or directory in...