Unable to connect to cisco xr device, throwing errors "AbortionError: AbortionError(code=StatusCode.UNAVAILABLE, details="failed to connect to all addresses")"

[sujipanicker]

I am trying to connect to an xr device and unfortunately having issues.

options = 'ems.cisco.com'

client = CiscoGRPCClient('x.x.x.x', 57400, 10, 'username', 'password', pem, options)
client.getconfig('{"openconfig-interfaces:interfaces": [null]}')

This is throwing alerts as below, Any idea what might be the issue here. Appreciate your help.

/home/xxxx/ios-xr-grpc-python/iosxr_grpc/cisco_grpc_client.py in getconfig(self, path)
84 responses = self._stub.GetConfig(message, self._timeout, metadata=self._metadata)
85 objects, err = '', ''
---> 86 for response in responses:
87 objects += response.yangjson
88 err += response.errors

/home/xxx/gnmmi/lib/python3.6/site-packages/grpc/beta/_client_adaptations.py in next(self)
134
135 def next(self):
--> 136 return self._next()
137
138 def next(self):

/home/supanick/gnmmi/lib/python3.6/site-packages/grpc/beta/_client_adaptations.py in _next(self)
131 return next(self._iterator)
132 except grpc.RpcError as rpc_error_call:
--> 133 raise _abortion_error(rpc_error_call)
134
135 def next(self):

AbortionError: AbortionError(code=StatusCode.UNAVAILABLE, details="failed to connect to all addresses")