Error:
Odoo Server Error

Traceback (most recent call last):
  File "/home/accounts/src/odoo/saas-16/odoo/http.py", line 647, in _handle_exception
    return super(JsonRequest, self)._handle_exception(exception)
  File "/home/accounts/src/odoo/saas-16/odoo/http.py", line 684, in dispatch
    result = self._call_function(**self.params)
  File "/home/accounts/src/odoo/saas-16/odoo/http.py", line 340, in _call_function
    return checked_call(self.db, *args, **kwargs)
  File "/home/accounts/src/odoo/saas-16/odoo/service/model.py", line 102, in wrapper
    return f(dbname, *args, **kwargs)
  File "/home/accounts/src/odoo/saas-16/odoo/http.py", line 333, in checked_call
    result = self.endpoint(*a, **kw)
  File "/home/accounts/src/odoo/saas-16/odoo/http.py", line 929, in __call__
    return self.method(*args, **kw)
  File "/home/accounts/src/odoo/saas-16/odoo/http.py", line 513, in response_wrap
    response = f(*args, **kw)
  File "/home/accounts/src/odoo/saas-16/addons/web/controllers/main.py", line 851, in search_read
    return self.do_search_read(model, fields, offset, limit, domain, sort)
  File "/home/accounts/src/odoo/saas-16/addons/web/controllers/main.py", line 873, in do_search_read
    offset=offset or 0, limit=limit or False, order=sort or False)
  File "/home/accounts/src/odoo/saas-16/odoo/models.py", line 4148, in search_read
    result = records.read(fields)
  File "/home/accounts/src/odoo/saas-16/odoo/models.py", line 2517, in read
    values[name] = field.convert_to_read(record[name], record, use_name_get)
  File "/home/accounts/src/odoo/saas-16/odoo/models.py", line 4663, in __getitem__
    return self._fields[key].__get__(self, type(self))
  File "/home/accounts/src/odoo/saas-16/odoo/fields.py", line 915, in __get__
    self.determine_value(record)
  File "/home/accounts/src/odoo/saas-16/odoo/fields.py", line 1026, in determine_value
    self.compute_value(recs)
  File "/home/accounts/src/odoo/saas-16/odoo/fields.py", line 981, in compute_value
    self._compute_value(records)
  File "/home/accounts/src/odoo/saas-16/odoo/fields.py", line 972, in _compute_value
    getattr(records, self.compute)()
  File "/home/accounts/src/odoo/saas-16/addons/sales_team/models/crm_team.py", line 92, in _compute_dashboard_graph
    team.dashboard_graph_data = json.dumps(team._get_graph())
  File "/home/accounts/src/odoo/saas-16/addons/crm/models/crm_team.py", line 212, in _get_graph
    graph_datas = super(Team, self)._get_graph()
  File "/home/accounts/src/odoo/saas-16/addons/sales_team/models/crm_team.py", line 207, in _get_graph
    graph_data = self._graph_data(start_date, end_date)
  File "/home/accounts/src/odoo/saas-16/addons/pos_sale/models/crm_team.py", line 99, in _graph_data
    return super(CrmTeam, self)._graph_data(start_date, end_date)
  File "/home/accounts/src/odoo/saas-16/addons/sales_team/models/crm_team.py", line 167, in _graph_data
    GraphModel = self.env[self.dashboard_graph_model]
  File "/home/accounts/src/odoo/saas-16/odoo/api.py", line 752, in __getitem__
    return self.registry[model_name]._browse((), self)
  File "/home/accounts/src/odoo/saas-16/odoo/modules/registry.py", line 176, in __getitem__
    return self.models[model_name]
KeyError: u'sales'