Unknown SSL protocol error in connection to crm.zoho.com:443

Unknown SSL protocol error in connection to crm.zoho.com:443

Hi,

We have been using ZOHO API to update records in our ZOHO CRM. We have 1400-1500 records to be updated every month. Recently, the updates keep stopping at a certain number of records with the following error message:

'Unknown SSL protocol error in connection to crm.zoho.com:443 'error occurred during curl exec.

Please advise on  how to troubleshoot this.

Regards,
Winny