On this page, you will find more information about the most common causes and most relevant solutions for the Zoho Docs error 'R6001'. Do you need help straight away? Visit our support page.
The Zoho documentation indicates that error code 'R6001' is caused by the following problem: "This error occurs when the 'recipient email address' or 'signed_document_name' parameters not provided or merge data is missing.".
Do you think there is another cause for this error? Let others know in the comments.