Removing password for meeting room - requests admin assistance, but no admin

[amandaj47]

It says I need to contact my admin to remove a password from my meeting room, but I don't have an admin. Anyone know how to fix this? I tried to follow steps from a previous question, but going to User Management Roles to enter myself as admin doesn't work, there's no place to add myself as admin. It just asks for billing information, but I'm on the free version.