Hi @Hansenhan , and welcome to the community! Sign in to the Zoom web portal, and ensure that the license is assigned to the appropriate user under 'User Management'.
1. Log in to the Zoom User page.
2. Find or search for the appropriate user in the list
3. Click 'Edit' on the right
4. Choose the appropriate license to assign (Basic to Licensed, Webinar, Large Meeting)
5. Click Save
The license is then applied and you can use it immediately. If not immediately reflected on the Zoom Application, please sign out and sign back in to ensure that the changes get pushed to the app.
Hope this helps!