ModuleNotFoundError: No module named 'paddle_serving_server.proto

[UserShen-001]

An error occurs when running command ：
``λ 71fd011ae915 /home/Serving/python {v0.9.0} python3 -m paddle_serving_server.serve check
Traceback (most recent call last):
File "/usr/local/lib/python3.6/runpy.py", line 183, in _run_module_as_main
mod_name, mod_spec, code = _get_module_details(mod_name, _Error)
File "/usr/local/lib/python3.6/runpy.py", line 109, in _get_module_details
import(pkg_name)
File "/home/Serving/python/paddle_serving_server/init.py", line 22, in
from paddle_serving_server import (
File "/home/Serving/python/paddle_serving_server/server.py", line 20, in
from .proto import server_configure_pb2 as server_sdk
ModuleNotFoundError: No module named 'paddle_serving_server.proto'

Use pip list to check the current environment. Paddle-serving-client ，paddle-serving-server and paddle-serving-server are installed.
`λ 71fd011ae915 /home/Serving/python {v0.9.0} pip list
Package Version

---

attrs 22.2.0
av 8.0.3
beautifulsoup4 4.12.3
certifi 2024.2.2
charset-normalizer 2.0.12
click 7.1.2
decord 0.4.2
Flask 1.1.4
func-timeout 4.3.5
google 3.0.0
google-cloud 0.34.0
grpcio 1.33.2
grpcio-tools 1.33.2
idna 3.6
importlib-metadata 4.8.3
iniconfig 1.1.1
itsdangerous 1.1.0
Jinja2 2.11.3
MarkupSafe 1.1.1
numpy 1.19.5
opencv-python 3.4.17.61
packaging 21.3
paddle-serving-app 0.9.0
paddle-serving-client 0.9.0
paddle-serving-server 0.9.0
Pillow 8.4.0
pip 21.3.1
pluggy 1.0.0
prometheus-client 0.12.0
protobuf 3.19.6
py 1.11.0
pyclipper 1.2.1
pyparsing 3.0.7
pytest 7.0.1
PyYAML 6.0.1
requests 2.27.1
sentencepiece 0.1.96
setuptools 59.6.0
Shapely 1.8.0
SimpleITK 2.1.1.2
six 1.16.0
soupsieve 2.3.2.post1
tomli 1.2.3
typing_extensions 4.1.1
ujson 4.3.0
urllib3 1.26.18
Werkzeug 1.0.1
wheel 0.34.2
zipp 3.6.0`

Currently python is 3.6
λ 71fd011ae915 /home/Serving/python {v0.9.0} python3 -V Python 3.6.0

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