When I am trying to get the access token with the temporary token, I am always getting this error. Could you please help me to sort this out urgently?
Try to restart the steps from generating the temporary token to creating a new request in Postman.
Let me know if it works when you try again.
I tried as told and the same issue is occurring. Sorry for the late reply. I didn't get any notification regarding the reply to this post. Could you please help me to sort this out?
You included these values in the request header. They need to be in the request body. See working example below.