Unable to access /room/new after mix phx.server

[KiaboyZ]

Hi, I'm trying to follow the guide at: https://littlelines.com/blog/2020/07/06/building-a-video-chat-app-in-phoenix-liveview

When I get to the first step where you can run "iex -S mix phx.server", and I go to "http://localhost:4000/room/new"
It returns "function Room.NewLive.__live__/0 is undefined (module Room.NewLive is not available)"

I don't really see why this is the case as the guide does not mention live anywhere, and my attempts to change things/move things result in different errors. Any guidance would be appreciated. Thanks.