After turning on the Mattermost service is available only logo

Hi!

I've turned on the service in according instructions

http://doc.gitlab.com/omnibus/gitlab-mattermost/README.html

After restarting the service is available, but he gives only Mattermost welcome page.

Channels, settings and teams are not available.

Please prompt, what to do next?

Here is the used version.

Version: 1.2.1
Build Number: 4063
Build Date: Mon Nov 16 16:56:43 UTC 2015
Build Hash: 49a459d696fc8fee0b508990fca571fb8d2f2654

Thank you in advance