I cant use webserver.

I have multi workers configured.

I am having below error

  File "/opt/odoo/odoo/http.py", line 507, in response_wrap

    response = f(*args, **kw)

  File "/opt/odoo/addons/bus/controllers/main.py", line 35, in poll

    raise Exception("bus.Bus unavailable")

How can i fix it without setting up webserver.

Thanks