Question: members = message_launch.get_nrps().get_members() get error as "the aud is invalid"

[lch1999]

When I use the scoreboard(), the code "members = message_launch.get_nrps().get_members()" in scoreboard() of app.py get the error as a "{"error":"invalid_request","error_description":"the 'aud' is invalid"} for https:///login/oauth2/token request I verified here the aud value is going as a https:///login/oauth2/token, I am not getting what aud value should be here.

Here is the log:
Traceback (most recent call last):
File "//anaconda3/envs//lib/python3.9/site-packages/flask/app.py", line 2548, in call
return self.wsgi_app(environ, start_response)
File "//pylti1.3-flask-example/game/app.py", line 26, in call
return self.app(environ, start_response)
File "//anaconda3/envs//lib/python3.9/site-packages/flask/app.py", line 2528, in wsgi_app
response = self.handle_exception(e)
File "//anaconda3/envs//lib/python3.9/site-packages/flask/app.py", line 2525, in wsgi_app
response = self.full_dispatch_request()
File "//anaconda3/envs//lib/python3.9/site-packages/flask/app.py", line 1822, in full_dispatch_request
rv = self.handle_user_exception(e)
File "//anaconda3/envs//lib/python3.9/site-packages/flask/app.py", line 1820, in full_dispatch_request
rv = self.dispatch_request()
File "//anaconda3/envs//lib/python3.9/site-packages/flask/app.py", line 1796, in dispatch_request
return self.ensure_sync(self.view_functions[rule.endpoint])(**view_args)
File "//pylti1.3-flask-example/game/app.py", line 306, in enrolls
members = message_launch.get_nrps().get_members()
File "//anaconda3/envs//lib/python3.9/site-packages/pylti1p3/names_roles.py", line 84, in get_members
members, members_url = self.get_members_page(members_url)
File "//anaconda3/envs//lib/python3.9/site-packages/pylti1p3/names_roles.py", line 66, in get_members_page
data = self.get_nrps_data(members_url=members_url)
File "//anaconda3/envs//lib/python3.9/site-packages/pylti1p3/names_roles.py", line 48, in get_nrps_data
data = self.service_connector.make_service_request(
File "//anaconda3/envs//lib/python3.9/site-packages/pylti1p3/service_connector.py", line 131, in make_service_request
access_token = self.get_access_token(scopes)
File "//anaconda3/envs//lib/python3.9/site-packages/pylti1p3/service_connector.py", line 101, in get_access_token
raise LtiServiceException(r)
pylti1p3.exception.LtiServiceException: HTTP response [https://__/login/oauth2/token]: 400 - {"error":"invalid_request","error_description":"the 'aud' is invalid"}

Looking forward to your reply.