HTTP clone error 502

Hi , i install gitlab of manul , then install nginx and do this step https://gitlab.com/gitlab-org/omnibus-gitlab/blob/master/doc/settings/nginx.md#vhost-server-block and its works in vhost , but if a do git clone http://git.izac.com.ua/izac/cola.git i have error like this Cloning into 'cola'... fatal: unable to access 'http://git.izac.com.ua/izac/cola.git/': The requested URL returned error: 502``

of ssh works all fine.

in /var/log/gitlab/nginx/gitlab_error.log i have error like this

2015/11/29 18:55:27 [crit] 3740#0: *10 connect() to unix://var/opt/gitlab/gitlab-workhorse/socket failed (13: Permission denied) while connecting to upstream, client: 89.76.8.64, server: git.xxx.xxx.xxx.xxx, request: "GET /izac/lol_mobile_app.git/info/refs?service=git-upload-pack HTTP/1.1", upstream: "http://unix://var/opt/gitlab/gitlab-workhorse/socket:/izac/lol_mobile_app.git/info/refs?service=git-upload-pack", host: "git.xxx.xxx.xxx.xxx"

if add web_server['external_users'] = ['www-data']

have in /var/log/gitlab/nginx/gitlab_access.log

xxx.xxx.xxx.xxx - - [28/Nov/2015:17:39:12 -0500] "GET /izac/cola.git/info/refs?service=git-upload-pack HTTP/1.1" 500 22 "-" "git/2.6.3.windows.1"

in /var/log/gitlab/gitlab-workhorse/current

2015-11-28_22:48:20.08105 2015/11/28 17:48:20 GET "/izac/cola.git/info/refs?service=git-upload-pack" 2015-11-28_22:48:20.08113 2015/11/28 17:48:20 doAuthRequest: Get http://127.0.0.1:8080/izac/cola.git/info/refs?service=git-upload-pack: dial tcp 127.0.0.1:8080: getsockopt: connection refused