Using SharePoint 2016 Server on-prem Nintex, I'm running the Workflow on the Document Library that have CSV file, I want to read the content of CSV file using Web Request Action but getting an Error, I used the Item URL , as well as the File link URL directly but not able to read the file, getting Not Found. I tested the link I can open the file in the browser. 

Also doing same thing in SharePoint online with Nintex O365 using Web Request Action and it's working fine.

Please advice.

-Sal