Studio lost it's presenter/media controls
I've been playing around with Studio in order to learn how it does things, and by uploading a media file managed to get the director's screen lower-left region stuck saying "loading indicator todo". All of the right-side controls work, and the man display works, but all of the presenter/media controls have vanished. About the only thing I haven't tried is restarting chrome....
I'm sorry to hear you're having this problem. It is a known bug that can occur when an unsupported file type is uploaded to Studio. It causes the current Studio to enter a broken state. At the moment, if this occurs, the next step is to create a new Studio environment.
The dev team is aware of this and is working towards a fix that will prevent the ability for unsupported files to be uploaded.