What does this error log mean?
JS: [INFO]: [PhotonSDK] Join Random Room default_lobby 2 ...
ERROR: Error: Master: PhotonPeer[_send] - Operation 225 - failed, "isConnected" is false , "isClosing" is false !, location: src/project.js:24305:31
And Where can I handle it?
In weak network, it come out frequently.
Most likely client had been disconnected before you started join random room operation.