Create room Cors Error

[oguzose]

Hello, when i click the Create Room button, console has error like this:

Access to XMLHttpRequest at 'https://firestore.googleapis.com/google.firestore.v1.Firestore/Listen/channel?database=projects...' from origin 'http://localhost:5000' has been blocked by CORS policy: The value of the 'Access-Control-Allow-Origin' header in the response must not be the wildcard '*' when the request's credentials mode is 'include'. The credentials mode of requests initiated by the XMLHttpRequest is controlled by the withCredentials attribute.

Can you help me?

[ErikHellman]

Did you perform the tasks mentioned in the codelab for logging in and associating the project with your own Firebase Project? See https://webrtc.org/getting-started/firebase-rtc-codelab#4_install_the_firebase_command_line_interface