Google Calendar Not Populating

We have had this issue with you guys before after an update. The software was happily syncing with Google Calendars, however after the update it seems to have broken!

I have checked the api details etc and they are all fine, last time you did a fix.

The error coming up is saying check a log.

I have enabled support access already.

Please can you fix this urgently, we rely on bookings being transferred to google calendar.

When you try and test the google calendar settings it comes up and says failed