Hi, a 401 HTTP error means:
a request was not successful because it lacks valid authentication credentials for the requested resource
So I would look into how you are entering the auth credentials (Bearer header if there is one, etc).
Also, please note that this is very hard to troubleshoot without looking at the request being sent, so I suggest you use an online tool (or whatever means) to receive the request yourself and look at it.
I describe how I do it in this post:
Can you look and double check your requests arrive with the shape and form is needed and you intended?
Best,