Hello,
The reason why it says your license has expired is because once you invite a user with a specific user type, you cannot change it on your trial. If you want to experience different permissions/licenses on your trial account, you would need to invite another user with a different user type. You can do this when you are first inviting a user and go to advanced options. Trial licenses are static and they are not the same as purchased licenses where you can change them dynamically between users.