Hi, I'm writing my first module for Odoo (v9.0). To do that I installed OS requirements using the package manager and odoo using git. Starting the server I get this output:

ERROR test_00 openerp.http: Exception during JSON request handling.
...
Exception: bus.Bus only string channels are allowed.

I'm not sure why this happens and how to fix, any idea?

The full traceback:

(odoo_test00)vagrant@trusty:~/devel/odoo_test00$ odoo.py --db-filter=test_00 --log-level warn
2015-11-17 11:07:58,610 17343 ERROR test_00 openerp.http: Exception during JSON request handling.
Traceback (most recent call last):
 File "/home/vagrant/devel/repos/odoo/openerp/http.py", line 599, in _handle_exception
 return super(JsonRequest, self)._handle_exception(exception)
 File "/home/vagrant/devel/repos/odoo/openerp/http.py", line 636, in dispatch
 result = self._call_function(**self.params)
 File "/home/vagrant/devel/repos/odoo/openerp/http.py", line 315, in _call_function
 return checked_call(self.db, *args, **kwargs)
 File "/home/vagrant/devel/repos/odoo/openerp/service/model.py", line 118, in wrapper
 return f(dbname, *args, **kwargs)
 File "/home/vagrant/devel/repos/odoo/openerp/http.py", line 308, in checked_call
 result = self.endpoint(*a, **kw)
 File "/home/vagrant/devel/repos/odoo/openerp/http.py", line 887, in __call__
 return self.method(*args, **kw)
 File "/home/vagrant/devel/repos/odoo/openerp/http.py", line 465, in response_wrap
 response = f(*args, **kw)
 File "/home/vagrant/devel/repos/odoo/addons/bus/controllers/main.py", line 36, in poll
 raise Exception("bus.Bus only string channels are allowed.")
Exception: bus.Bus only string channels are allowed.
2015-11-17 11:07:58,813 17343 ERROR test_00 openerp.http: Exception during JSON request handling.
Traceback (most recent call last):
 File "/home/vagrant/devel/repos/odoo/openerp/http.py", line 599, in _handle_exception
 return super(JsonRequest, self)._handle_exception(exception)
 File "/home/vagrant/devel/repos/odoo/openerp/http.py", line 636, in dispatch
 result = self._call_function(**self.params)
 File "/home/vagrant/devel/repos/odoo/openerp/http.py", line 315, in _call_function
 return checked_call(self.db, *args, **kwargs)
 File "/home/vagrant/devel/repos/odoo/openerp/service/model.py", line 118, in wrapper
 return f(dbname, *args, **kwargs)
 File "/home/vagrant/devel/repos/odoo/openerp/http.py", line 308, in checked_call
 result = self.endpoint(*a, **kw)
 File "/home/vagrant/devel/repos/odoo/openerp/http.py", line 887, in __call__
 return self.method(*args, **kw)
 File "/home/vagrant/devel/repos/odoo/openerp/http.py", line 465, in response_wrap
 response = f(*args, **kw)
 File "/home/vagrant/devel/repos/odoo/addons/bus/controllers/main.py", line 36, in poll
 raise Exception("bus.Bus only string channels are allowed.")
Exception: bus.Bus only string channels are allowed.