OAuth2.0 (3LO) not working for Groups API with by-ID parameter but works for by-name parameters

[sam saas]

Hi, I have added all the scopes in Confluence app management page to my app.
And using the token generated, I am able to get the groups (https://developer.atlassian.com/cloud/confluence/rest/api-group-group/#api-api-group-get)
But using the same token, it still gives me 401 error for GET /wiki/rest/api/group/{groupId}/membersByGroupId

image2964×618 78.6 KB

Whereas the get group members by name endpoint (https://developer.atlassian.com/cloud/confluence/rest/api-group-group/#api-api-group-member-get)
works fine with the same token.

image2956×742 176 KB

In addition to this I get the same error for these endpoints too :
https://developer.atlassian.com/cloud/confluence/rest/api-group-users/#api-api-user-memberof-get

https://developer.atlassian.com/cloud/confluence/rest/api-group-group/#api-api-group-userbygroupid-delete