Google Calendar Sync stops working from time to time

Hello,

I am using the connect plugin to synchronise with a Google Calendar. But from time to time, it does not block anymore the timeslots when an appointment is added directly to Google Calendar. Which leads to double appointments, which is something we really want to avoid.

I then have to reconfigure the plugin to make it work again.

Any idea why? If you need any log file please tell me where to find them and I’ll gladly provide you these.