Zoho CRM integration not working

I tried to set up Forms integration with Zoho CRM and failed so far. I connected them successfully. The Zoho screen in Forms connects to the Zoho account and shows fields to be mapped. I map the fields. But form submissions don't create anything in Zoho leads or contacts. Documentation for this integration is very limited and only shows how to turn the integration on. What am I doing wrong?

Replies are visible only to logged in members with an active subscription.