Smartsheet & Docusign integration - Error for sending docs due to "failed email and/or name cells"



I established an integration between Smartsheet and Docusign. I have assigned roles in Docusign and mapped the relevant columns in Smartsheet. In smartsheet I enabled the relevant colums to be contactlists. The contact I used for testing is my own name + email address (which should be correct).

Neverthess, I get an error message that Smartsheet "failed to find email and/or name cells for recipient XX"

Anyone that can help me to figure out where it breaks? All email addresses are filled and should be correct… Also, how do I know to which recipient (29726636) the error message is refering to?

Thank you,