RPC_ERROR

Odoo Server Error

Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/odoo/http.py", line 1584, in _serve_db
    return service_model.retrying(self._serve_ir_http, self.env)
  File "/usr/lib/python3/dist-packages/odoo/service/model.py", line 133, in retrying
    result = func()
  File "/usr/lib/python3/dist-packages/odoo/http.py", line 1611, in _serve_ir_http
    response = self.dispatcher.dispatch(rule.endpoint, args)
  File "/usr/lib/python3/dist-packages/odoo/http.py", line 1815, in dispatch
    result = self.request.registry['ir.http']._dispatch(endpoint)
  File "/usr/lib/python3/dist-packages/odoo/addons/website/models/ir_http.py", line 235, in _dispatch
    response = super()._dispatch(endpoint)
  File "/usr/lib/python3/dist-packages/odoo/addons/base/models/ir_http.py", line 154, in _dispatch
    result = endpoint(**request.params)
  File "/usr/lib/python3/dist-packages/odoo/http.py", line 697, in route_wrapper
    result = endpoint(self, *args, **params_ok)
  File "/usr/lib/python3/dist-packages/odoo/addons/web/controllers/dataset.py", line 42, in call_kw
    return self._call_kw(model, method, args, kwargs)
  File "/usr/lib/python3/dist-packages/odoo/addons/web/controllers/dataset.py", line 33, in _call_kw
    return call_kw(request.env[model], method, args, kwargs)
  File "/usr/lib/python3/dist-packages/odoo/api.py", line 457, in call_kw
    result = _call_kw_model(method, model, args, kwargs)
  File "/usr/lib/python3/dist-packages/odoo/api.py", line 430, in _call_kw_model
    result = method(recs, *args, **kwargs)
  File "/usr/lib/python3/dist-packages/odoo/addons/mass_mailing/models/res_users.py", line 16, in systray_get_activities
    activities = super(Users, self).systray_get_activities()
  File "/usr/lib/python3/dist-packages/odoo/addons/note/models/res_users.py", line 55, in systray_get_activities
    activities = super(Users, self).systray_get_activities()
  File "/usr/lib/python3/dist-packages/odoo/addons/contacts/models/res_users.py", line 15, in systray_get_activities
    activities = super(Users, self).systray_get_activities()
  File "/usr/lib/python3/dist-packages/odoo/addons/calendar/models/res_users.py", line 37, in systray_get_activities
    res = super(Users, self).systray_get_activities()
  File "/usr/lib/python3/dist-packages/odoo/addons/mail/models/res_users.py", line 237, in systray_get_activities
    user_activities[model_name]["%s_count" % activity.state] += 1
KeyError: 'done_count'

The above server error caused the following client error:
RPC_ERROR: Odoo Server Error
    at makeErrorFromResponse (http://192.168.0.200:8069/web/assets/2116-aca7c23/web.assets_backend.min.js:983:163)
    at XMLHttpRequest. (http://192.168.0.200:8069/web/assets/2116-aca7c23/web.assets_backend.min.js:991:13)