ConfigParser instance has no attribute 'read_file' about mavcesium HOT 3 OPEN

_Failed to use config file at D:\MyProject\MAVCesium\app\mavcesium_default.ini : ConfigParser instance has no attribute 'read_file'
Traceback (most recent call last):
  File ".\cesium_web_server.py", line 279, in <module>
    module(optsargs)
  File ".\cesium_web_server.py", line 182, in __init__
Exception in thread Thread-1:
Traceback (most recent call last):
  File "C:\Python27\lib\threading.py", line 801, in __bootstrap_inner
    self.run()
  File "C:\Python27\lib\threading.py", line 754, in run
    self.__target(*self.__args, **self.__kwargs)
  File ".\cesium_web_server.py", line 141, in main
    server = start_app(config=config, module_callback=module_callback)
  File ".\cesium_web_server.py", line 102, in start_app
    application = Application(config, module_callback)
  File ".\cesium_web_server.py", line 86, in __init__
    (r"/"+config.APP_PREFIX, MainHandler, args),
AttributeError: 'Configuration' object has no attribute 'APP_PREFIX'

self.main_loop()
  File ".\cesium_web_server.py", line 249, in main_loop
    self.process_connection_in() # any down time (max 0.1 sec) occurs here
  File ".\cesium_web_server.py", line 215, in process_connection_in
    self.connection.control_connection.recv_msg()
  File "C:\Python27\lib\site-packages\pymavlink\mavutil.py", line 318, in recv_msg
    s = self.recv(n)
  File "C:\Python27\lib\site-packages\pymavlink\mavutil.py", line 989, in recv
    data = self.port.recv(n)
socket.error: [Errno 10053]_