Text Tag Field Names

We are implementing Conditional fields.  I am starting by trying to get our existing text tag to use the fieldName.  From the documentation, I see this syntax  {{esl_SignerAutograph:signer1:Signature}} .

Using that as a sample I changed my tag to {{?esl_lender:A201Name1:textfield:,offset(0,-15), size(275,25), maxlen(40)}}.  The A201Name1 represents the signer1.  When I submit a package to the designer with this tag I get the following error:

Could not upload documents to package. Exception: The remote server returned an error: (400) Bad Request. HTTP POST on URI https://sandbox.esignlive.com/api/packages/z4Eo-ny5j3f_TmzxWmVrzhle2AE=/documents. Optional details: {"messageKey":"error.validation.texttag.propertiesFormatError","message":"{{?esl_lender:A201Name1:textfield:,offset(0,-15), size(275,25), maxlen(40)}}: Properties format error.","parameters":{"tag":"{{?esl_lender:A201Name1:textfield:,offset(0,-15), size(275,25), maxlen(40)}}"},"code":400,"name":"Validation Error"}