Contacts are mot updating

I am using an google account to keep my contacts. In the beginning it worked well with eM Client but now it doesn´t update. If I change any contact or create a new one, it is not reflected in my google account.
In the error console it indicates that there is a “connection error” with the email account, but the emails and the calendar works without problems.
I have had this problem for a while. At first it worked perfectly for me. Any change in the contacts in eM Client, it was updated immediately in the google account
thanks Manuel

It depends on what the error is.

But if you are using an eM Client release older than 8.2.x, it will not sync the contacts with Google. That is because of a change Google made in the API. You will need to update to the latest version available in the Release History

The version is 8.2.1659 (845a639). It is the lastest?

Have you tried removing the account and re-adding the account, after making an eMC backup (Menu > Backup)