How can I solve this problem?

parkjb123

firefly@firefly:~/rknn-toolkit-1.3.0/examples/darknet/yolov3$ python3 test.py
yolov3.weight exist.
--> Loading model
done
--> Building model
done
--> Export RKNN model
done
--> init runtime
E Only support ntb mode on ARM64 platform. But can not find device with ntb mode.
E Catch exception when init runtime!
E Traceback (most recent call last):
E   File "rknn/api/rknn_base.py", line 963, in rknn.api.rknn_base.RKNNBase.init_runtime
E   File "rknn/api/rknn_runtime.py", line 161, in rknn.api.rknn_runtime.RKNNRuntime.__init__
E   File "rknn/api/rknn_platform_utils.py", line 268, in rknn.api.rknn_platform_utils.start_ntp_or_adb
E Exception: Init runtime environment failed!
E Current device id is: None
E Devices connected:
E []
init runtime failed.

I solved it with an update.
apt-get install firefly-3399pronpu-driver