Problem with PUN and Playfab

Hi Team,

I'm using playfab and PUN, I have loggedin, get playfab userid and playfab photon token, but after that, i have error when create room:
Operation 227 failed in a server-side plugin. Check the configuration in the Dashboard. Message from server-plugin: Failed to create game on https://9257.playfablogic.com/webhook/1/prod/xxxxxxxxxxxx/RoomCreated? : Error response ResultCode='2' Message='User not found'.

Here is my code after get playfab id and token

public void Connect() {
isConnecting = true;
if (PhotonNetwork.connected) {
showLog("Joining room...");
PhotonNetwork.JoinRandomRoom();
PhotonNetwork.JoinRandomRoom(null, (byte)4);
}
else {
showLog("Connecting...");
PhotonNetwork.ConnectUsingSettings(gameVersion);
}
}