gmail calendar problem

GMail no longer synchronises with EM Client for the calendar. I get the following errors in the log. It worked until a few days ago.

Hello Kevin, sorry to see this, we came across this issue quite recently, but unfortunately it seems to be caused by Gmail’s shutdown of some former services that were used with eM Client in the past, can you please try to re-setup your account in eM Client and check if the issue persists?

All users that have seemed to point out this issue to us have been successful in work-arounding this issue by removing and re-addding the account to the list of your accounts in eM Client, please make sure to let me know if the issue persists.

Before you re-setup the account, make sure to update your eM Client to the latest available version using this update, 6.0.22504.0 .

Thank you,