Could not parse expression [shippercontacte-mails]. Details: Unexpected count of record variables in webAPI

Hi All,

i have a webApi, when i test it it gives the error "Could not parse expression [shippercontacte-mails]. Details: Unexpected count of record variables in webAPI",

if i select the columns without this column 

it works fine, please let me know what is it to be checked.

Thanks in advance