When I log into odoo I'm getting a few popups with the  Odoo Session Expired error. I've tried with the incognito tab on firefox cleard the history in chrome but I all ways get this error.

Traceback (most recent call last):
  File "/opt/odoo/odoo10/odoo/http.py", line 638, in _handle_exception
    return super(JsonRequest, self)._handle_exception(exception)
  File "/opt/odoo/odoo10/odoo/addons/base/ir/ir_http.py", line 184, in _dispatch
    auth_method = cls._authenticate(func.routing["auth"])
  File "/opt/odoo/odoo10/odoo/addons/base/ir/ir_http.py", line 112, in _authenticate
    getattr(cls, "_auth_method_%s" % auth_method)()
  File "/opt/odoo/odoo10/odoo/addons/base/ir/ir_http.py", line 85, in _auth_method_user
    raise http.SessionExpiredException("Session expired")

SessionExpiredException: Session expired  

When I click three times to close all tree popups I can't do anything as clicking a menu item. Then I get the popups again.

Any fix for this? 

This happens only when I define workers and max_cron_threads. When I comment those two things out and restart odoo it works normally.