Managed to solve this from our side. I am now able to render files on the farm. Our focus has currently shifted towards further customizing the Integrated Submission script. Need support with that.
This is the relevant post for the query:
Have also raised a Support Ticket officially through the AWS Thinkbox Zendesk: Ticket 101312
This is a priority requirement for our team. Request your support at the earliest (preferably thorugh the ticket).