Means I need to call the report template generated from jsreport studio... right..?
No.
Right now you use jsreport.Local and jsreport.Binary nugets. These embeds jsreport binary inside and start it from inside your application running inside iis. This can be problematic. I proposed you start jsreport outside iis as a normal process and connect to it from your app. It should be just one line change for you as I demonstrated.
Here is how you can start jsreport
https://jsreport.net/on-prem