Errors in execute

Hi, I want to use NPU module of Khadas Vim3. when I run with default model, this error is occurred:
ubuntu@ubuntu-18:~/Desktop/aml_npu_sdk/acuity-toolkit/conversion_scripts$ ./
Fatal Python error: Py_Initialize: Unable to get the locale encoding
ImportError: No module named ‘encodings’

Current thread 0x00007f4a46602740 (most recent call first):
./ line 19:  2731 Aborted                 (core dumped) $convert_tf --tf-pb ./model/inception_v3_2016_08_28_frozen.pb --inputs input --input-size-list '299,299,3' --outputs InceptionV3/Predictions/Reshape_1 --net-output ${NAME}.json --data-output ${NAME}.data

@NG1368 Did you installed dependent packages according to documentation ?

This error mean that you have some python packages not install