Disable : room creation for listener

streaming-react-app/src/RoomConfig.tsx

@@ -232,7 +232,7 @@ export default function RoomConfig({
                 disabled={
                   roomState?.room_id != null ||
                   joinInProgress ||
-                  streamingStatus !== "stopped" || !isValidRoles
+                  streamingStatus !== "stopped" || !roles["speaker"]
                 }
                 onClick={() => onJoinRoom(true)}
               >