Webhook only app requires scopes but I cannot add scopes

I am trying to activate the "Meeting has been created" webhook, but i am unable to select it as an event subscription because "You do not have permission to use this event. please reach out to your admin to grant you permission". I have access to the admin account but cant figure out what permission i need? Online sources tell me to add "scopes" but because this is a webhook only app, I am unable to add scopes. The webhook URL has been validated and works, I just cant add the specific event type. How do i get the webhook to work?