Getting same warning ConnectUsingSettings() failed. Can only connect while in state 'Disconnected'.

Hey! I'm having a problem. I'm using PUN. And Whenever i'm running my game and trying to connect it is showing a warning ConnectUsingSettings() failed. Can only connect while in state 'Disconnected'. Current state: Connected
UnityEngine.Debug:LogWarning(Object) an it is also showing PUN is in development mode (development build). As the 'dev region' is not empty (in) it overrides the found best region. See PhotonServerSettings.
UnityEngine.Debug:LogWarning(Object). Before this was not happening. i could connect easily. I tried to reconnect to my Wi Fi but then also the it was showing the same warning. Any helps would be great.