Okta HTTP 401 E0000011 Invalid token provided

The user is able to login successfully. When trying to create a client instance and check whether user is part of the group, I keep getting Invalid token provided. However, the token is still active and not expired.

Confirm that the user or client associated with the token has the necessary permissions to perform the action. In the context of group membership, the user or client may need specific permissions to query or verify group information.

What kind of user is this? Can you please elaborate on what you are trying to achieve?

You can get more assistance if you have access to open a case with Okta instead, which can give you more specific guidance.