Invite Organization Members

I am reaching out to ask about an issue I’ve encountered these two days.

I generate an invitation link in Auth0 with api request. The user receives the link, but in case of clicking the accept button the invitation status remains Pending and the roles don’t assign to the user. Maybe this is because I am using a free plan, please let me know if that’s the issue of the subscription so I save my time and activate the plan imediatelly.