Invalid Argument WebForm
Please see -&gt; What is the recommended/supported version of Webform CiviCRM module for Drupal 7?
First step would be to move to the supported version for D7WFC -&gt; 7.x-5.x
Your error message tells me you're on 7.x-4.x
https://github.com/colemanw/webform_civicrm/blob/7.x-4.x/includes/utils.inc#L910