rknn初始化错误

请问我们再用rknn跑实例教程时，在初始化时候报错，希望给解答一下，我们的板子是tb-96AI.

E NPUTransfer: Cannot connect to proxy: Connection refused
E RKNNAPI: rknn_init,  driver open fail!  ret = -4(ERROR_NO_DEVICE)!
rknn_init fail! ret=-3
image/0.bmp
1360,1024
E RKNNAPI: rknn_inputs_set,  context = nullptr!
rknn_input_set fail! ret=-7
pic-time=22ms
image/1.bmp
1600,1200
E RKNNAPI: rknn_inputs_set,  context = nullptr!
rknn_input_set fail! ret=-7
pic-time=8ms
image/2.bmp
1536,2048
E RKNNAPI: rknn_inputs_set,  context = nullptr!
rknn_input_set fail! ret=-7
pic-time=7ms