Script signature is not valid; Nintex Forms / Workflow 2013

Mar 19, 2015 at 7:23 PM
I'm getting a "The script signature is not valid" error when I add the custom action into the workflow design.

Would this be related to my Nintex version being 2013 instead of 2010?
Nov 18, 2015 at 3:42 PM
This solution has not been tested with SharePoint 2013. Sorry.