Zoho CRM has deprecated the API V1.0 and as of January 31st, 2020, any code that you have using the old V1.0 API's will no longer work.

Our team of Zoho professionals can help you migrate quickly and efficiently to the better, new API V2.0. We have affordable prices and short turnaround times. We do a complete impact analysis of the existing code, correct it, and hand you a comprehensive document detailing all actions performed, as well as the old and new code.

If you are having these issues, please reach out at: support@sunspotsla.com ASAP so we can help you get back on track.