How to fix error when running uwsgi conf.ini: "socket.error: [Errno 98] Address already in use"?

Question

Django

I want to check the work of uwsgi: I write a command
sudo uwsgi freechips.ini
and get the following:

Traceback (most recent call last):
  File "/home/webuser/fcprj/fcapp/reqrpc.py", line 138, in <module>
    sys.exit(main())
  File "/home/webuser/fcprj/fcapp/reqrpc.py", line 133, in main
    server = XMLRPCServer(('localhost', 4783))
  File "/home/webuser/fcprj/fcapp/reqrpc.py", line 42, in __init__
    bind_and_activate,
  File "/usr/lib/python2.7/SocketServer.py", line 417, in __init__
    self.server_bind()
  File "/usr/lib/python2.7/SocketServer.py", line 431, in server_bind
    self.socket.bind(self.server_address)
  File "<string>", line 1, in bind
socket.error: [Errno 98] Address already in use

Here is my config file : freechips.ini

plugins = python27
        virtualenv = /home/webuser/venv
        chdir = /home/webuser/fcprj
#       python-path = /home/webuser/fcprj
        pythonpath= /home/webuser/fcprj/fcprj/settings.py/
        env = DJANGO_SETTINGS_MODULE=fcprj.production
        module = fcprj.wsgi
        uid = webuser
        gid = www-data
#       daemonize = /var/log/uwsgi/app/freechips/freechips.log

        cron2 = minute=0 /home/webuser/venv/bin/python /home/webuser/fcprj/manage.py update_ranks

        attach-daemon = /home/webuser/venv/bin/python /home/webuser/fcprj/fcapp/reqrpc.py

        plugin = spooler
        spooler = /home/webuser/fcprj/spooler
        spooler-python-import = django_uwsgi.task
        spooler-python-import = fcapp.tasks

        attach-daemon = /home/webuser/venv/bin/uwsgi --python-path /home/webuser/fcprj --module fcapp.sseapp --socket /tmp/fcsse --gevent --gevent-monkey-patch --async 1000
        offload-threads = 1
        collect-header = X-Offload-to-SSE X_OFFLOAD
        response-route-if-not = empty:${X_OFFLOAD} disableheaders:
        response-route-if-not = empty:${X_OFFLOAD} uwsgi:/tmp/fcsse,0,0
        autoload        = true
        master  = true
        enable-threads = true
        processes = 4
        threads = 2
        thunder-lock = true
        workers = 2
        pidfile = /tmp/freechips.pid
        socket  = /tmp/freechips.socket
        chmod-socket = 660
        log-date = true
        uid = webuser
        gid = www-data
#       logger = file:/var/log/uwsgi/app/freechips/freechips.log
#       hook-as-root=exec:mkdir -vp /var/run/uwsgi/app/freechips; chown -R webuser:www-data /var/run/uwsgi

I changed different ports in /home/webuser/fcprj/fcapp/reqrpc.py file but same error