I am trying to post a message to cliq from a custom function and I get operation failed response back everytime. 

I have tried to use the below code from a custom function inside CRM, Flow, and Cliq and all 3 places fail

CliqMessage = zoho.cliq.postToUser (" example@zoho.com", "Hello");

Info CliqMessage;

The info statement just returns operation failed, no other explanation.

I have also tried using the user's ZUID and still get operation failed.

What surprised me the most was that it even fails from a custom function written in Cliq

Any thoughts on what the problem might be???