For the windows-log is it an error because the event-id 300 had no description - therefore this must not be an real error. If you clicked on details you will get more informations what happens - id 300 meant that there was any broken communication between the qv server and the access point like a session timeout or an application-refresh and maybe more something similar. By all those things qv react and creates/updates the session or ask the user for a new login and so on - It's more an information instead an real error.