Hi, I'm sorry but I'm struggling to identify the problem you're describing. Did you already install the camera in her room? Because the message "wait for Caroline to get back" should only appear if you did so. If that's the case, you should just have to wait until nighttime to catch her returning. The room being closed off during daytime is intended. Caroline only goes out of her room on Tuesday, Thursday and Saturday evening (not night!). Only at these times you are able to open her door on the security terminal.
And could you please tell me which platform you are using?