We are happy to announce that Graylog 3.1 is public available since Friday the 16th August. Please see the release posting with some more details.
https://www.graylog.org/post/announcing-graylog-3-1
Please post questions regarding updates or problems not as answers to this text, use the board https://community.graylog.org/c/graylog and more important, please search before if someone might already had asked the same question before.