Our installation of Gitlab encounters Error 502

Anybody have an idea about the errors below? Any help will be appreciated.

NGINX error log shows:

2018-10-03_06:05:10.18897 time="2018-10-03T06:05:10Z" level=error msg=error correlation-id=fufqRgURh46 error="badgateway: failed after 30s: dial tcp 127.0.0.1:8080: i/o timeout" method=GET uri=/

==> /var/log/gitlab/gitlab-workhorse/current <==
2018-10-03_06:25:19.37238 time="2018-10-03T06:25:19Z" level=error msg=error correlation-id=yfMAjmxP0K3 error="badgateway: failed after 30s: dial tcp 127.0.0.1:8080: i/o timeout" method=GET uri=/
2018-10-03_06:25:19.37251 m.96089c.com @ - - [2018/10/03:06:25:19 +0000] "GET / HTTP/1.1" 502 2940 "" "Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; SV1)" 30.001
2018-10-03_06:25:19.37601 time="2018-10-03T06:25:19Z" level=error msg=error correlation-id=kkQD8kl0i05 error="badgateway: failed after 38s: read tcp 127.0.0.1:50709->127.0.0.1:8080: read: connection reset by peer" method=GET uri=/
2018-10-03_06:25:19.37614 m.96089c.com @ - - [2018/10/03:06:25:19 +0000] "GET / HTTP/1.1" 502 2940 "" "Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; SV1)" 38.006
2018-10-03_06:25:19.37627 time="2018-10-03T06:25:19Z" level=error msg=error correlation-id=SXtk7JyuE46 error="badgateway: failed after 38s: read tcp 127.0.0.1:50713->127.0.0.1:8080: read: connection reset by peer" method=GET uri=/

==> /var/log/gitlab/nginx/gitlab_error.log <==
2018/10/03 06:25:20 [alert] 15286#0: *1757394 10240 worker_connections are not enough while connecting to upstream, client: 11.11.2.120, server: gitlab.outblaze.net, request: "GET / HTTP/1.1", upstream: "http://unix:/var/opt/gitlab/gitlab-workhorse/socket:/", host: "m.96089c.com"
2018/10/03 06:25:20 [alert] 15286#0: *1757396 10240 worker_connections are not enough while connecting to upstream, client: 11.11.2.120, server: gitlab.outblaze.net, request: "GET / HTTP/1.1", upstream: "http://unix:/var/opt/gitlab/gitlab-workhorse/socket:/", host: "m.96089c.com"