Getting error 610 while Testing Bulk Import Program Members API Endpoint
I am just testing the Bulk Import Program Member API with Postman. Not sure why I am getting error 610: Requested resource not found while making the post call. Please let me know what wrong I am doing here.

API_Test contains:
firstName,lastName,Email
Naman1,Ojha1,nojha1@gmail.com
Naman2,Ojha2,nojha2@gmail.com
Naman3,Ojha3,nojha3@gmail.com
Naman4,Ojha4,nojha4@gmail.com
Naman5,Ojha5,nojha5@gmail.com
Naman6,Ojha6,nojha6@gmail.com
Naman7,Ojha7,nojha7@gmail.com
Naman8,Ojha8,nojha8@gmail.com
Naman9,Ojha9,nojha9@gmail.com