iam-security-error

A button function, previously working just fine, has suddenly stopped working.

The function fetches and opens the url of a related record in a new window.

Syntax is;

rec = zoho.crm.getRecordById("Deals",recId);

relRecId = rec.get("Lender").get("id");

relRec = zoho.crm.getRecordById("Vendors",relRecId);

relRecURL = relRec.get("Website");

openUrl(relRecURL,"new window");

info relRecURL;

return "";

When I save and execute the function, the url is correct but yet still getting the iam-security-error page.