Error issue when deploying model in ray server : AttributeError: Can't get attribute 'Router.app' on <module 'starlette.routing' from '/home/ray/anaconda3/lib/python3.8/site-packages/starlette/routing.py'>

Ray Libraries (Data, Train, Tune, Serve) Ray Serve
1

i use : serve run model:my_app for serving
The used code :

from fastapi import FastAPI
from transformers import pipeline
import ray
from ray import serve
from ray.runtime_env import RuntimeEnv

ray.init(address="ray://localhost:10001",runtime_env=RuntimeEnv( pip={"packages":["transformers", "fastapi"],"pip_version": "==22.0.2;python_version=='3.8.18'"}))

app = FastAPI()

@serve.deployment
@serve.ingress(app)
class SimpleModel:
    def __init__(self):
        self._classifier = pipeline("sentiment-analysis")

    @app.get("/")
    def classify(self, input_text: str) -> str:
        return self._classifier(input_text)[0]["label"]


my_app = SimpleModel.bind()