Ubuntu – django with nginx uwsgi bad gateway 502

i want to run django with nginx i followed this instructions and in

/etc/nginx/sites-available/cartoview_one

upstream django {
    server unix:///root/cartoview_project/mysite.sock; # for a file socket    }

server {
    listen      80;
    server_name xx.xx.xx.xx;
    charset     utf-8;

    # max upload size
    client_max_body_size 2048M;   # adjust to taste

    # Django media
    location /media  {
        alias /root/cartoview_project/uploaded;
    }

    location /static {
        alias /root/cartoview_project/static;
    }
    location / {
        uwsgi_pass  django;
        include     /root/cartoview_project/uwsgi_params; # the uwsgi_params file you installed
    }
}

then created symlink using:

sudo ln -s /etc/nginx/sites-available/cartoview_one /etc/nginx/sites-enabled

and in project folder mysite_uwsgi.ini:

[uwsgi]
project = cartoview_project
chdir           = /root/cartoview_project
module          = %(project).wsgi:application
home            = /root/env
master          = true
processes       = 10
socket          = /root/cartoview_project/mysite.sock
chmod-socket = 666
vacuum          = true
http-socket = 0.0.0.0:80

project structure :

.
|-- apps
|-- cartoview_project
|   |-- __init__.py
|   |-- __init__.pyc
|   |-- local_settings.py
|   |-- local_settings.pyc
|   |-- local_settings.py.sample
|   |-- settings.py
|   |-- settings.pyc
|   |-- urls.py
|   |-- wsgi.py
|   `-- wsgi.pyc
|-- default_oauth_apps.json
|-- initial_data.json
|-- manage.py
|-- mysite_uwsgi.ini
`-- uwsgi_params

when i try to access website with myip this message appear :

502 Bad Gateway

nginx/1.10.0 (Ubuntu)

error.log :

2017/02/06 09:46:41 [crit] 6867#6867: *1 connect() to
unix:///root/cartoview_project/mysite.sock failed (13:
Permission denied) while connecting to upstream, client:
xx.xx.xxx.xxx, server: xxx.xxx.xxx.xxx, request: "GET / HTTP/1.1", upstream:
"uwsgi://unix:///root/cartoview_project/mysite.sock:", host:
"xxx.xxx.xxx.xxx"

Update :

i removed http-socket and run the following command /root/env/bin/uwsgi --ini mysite_uwsgi.ini and mysite.sock appeared in project then restart nginx but nothing changed.

:~/cartoview_project# stat mysite.sock
  File: 'mysite.sock'
  Size: 0               Blocks: 0          IO Block: 4096   socket
Device: 802h/2050d      Inode: 17172079    Links: 1
Access: (0666/srw-rw-rw-)  Uid: (    0/    root)   Gid: (    0/    root)
Access: 2017-02-06 10:44:56.188168371 +0100
Modify: 2017-02-06 10:44:56.188168371 +0100
Change: 2017-02-06 10:44:56.188168371 +0100
 Birth: -

Machine : vps(Ubuntu 16.04) User: root

Solved :
by changing include /root/cartoview_project/uwsgi_params to include /etc/nginx/uwsgi_params;