问谷歌AppEngine终结点错误:获取服务配置失败(状态代码404)

EN

 (/base/data/home/runtimes/python27_experiment/python27_lib/versions/1/google/appengine/runtime/wsgi.py:263)
Traceback (most recent call last):
  File "/base/data/home/runtimes/python27_experiment/python27_lib/versions/1/google/appengine/runtime/wsgi.py", line 240, in Handle
    handler = _config_handle.add_wsgi_middleware(self._LoadHandler())
  File "/base/data/home/runtimes/python27_experiment/python27_lib/versions/1/google/appengine/runtime/wsgi.py", line 299, in _LoadHandler
    handler, path, err = LoadObject(self._handler)
  File "/base/data/home/runtimes/python27_experiment/python27_lib/versions/1/google/appengine/runtime/wsgi.py", line 85, in LoadObject
    obj = __import__(path[0])
  File "/base/data/home/apps/s~test-app-129421/20170217t185546.399267289806711006/main.py", line 103, in <module>
    api = endpoints.api_server([EchoApi])
  File "/base/data/home/apps/s~test-app-129421/20170217t185546.399267289806711006/lib/endpoints/apiserving.py", line 520, in api_server
    controller)
  File "/base/data/home/apps/s~test-app-129421/20170217t185546.399267289806711006/lib/google/api/control/wsgi.py", line 121, in add_all
    a_service = loader.load()
  File "/base/data/home/apps/s~test-app-129421/20170217t185546.399267289806711006/lib/google/api/control/service.py", line 110, in load
    return self._load_func(**kw)
  File "/base/data/home/apps/s~test-app-129421/20170217t185546.399267289806711006/lib/google/api/config/service_config.py", line 78, in fetch_service_config
    _log_and_raise(Exception, message_template.format(status_code))
  File "/base/data/home/apps/s~test-app-129421/20170217t185546.399267289806711006/lib/google/api/config/service_config.py", line 126, in _log_and_raise
    raise exception_class(message)
Exception: Fetching service config failed (status code 404)