Rasa tain

RUN rasa train --force —> Running in c94e36541252 Traceback (most recent call last): File “/opt/venv/bin/rasa”, line 5, in from rasa.main import main File “/opt/venv/lib/python3.8/site-packages/rasa/main.py”, line 14, in from rasa.cli import ( File “/opt/venv/lib/python3.8/site-packages/rasa/cli/export.py”, line 8, in import rasa.core.utils File “/opt/venv/lib/python3.8/site-packages/rasa/core/utils.py”, line 24, in from rasa.core.lock_store import LockStore, RedisLockStore, InMemoryLockStore File “/opt/venv/lib/python3.8/site-packages/rasa/core/lock_store.py”, line 13, in from rasa.utils.endpoints import EndpointConfig File “/opt/venv/lib/python3.8/site-packages/rasa/utils/endpoints.py”, line 7, in from sanic.request import Request File “/opt/venv/lib/python3.8/site-packages/sanic/init.py”, line 2, in from sanic.app import Sanic File “/opt/venv/lib/python3.8/site-packages/sanic/app.py”, line 35, in from sanic.testing import SanicASGITestClient, SanicTestClient File “/opt/venv/lib/python3.8/site-packages/sanic/testing.py”, line 188, in class SanicASGIDispatch(httpx.ASGIDispatch): AttributeError: module ‘httpx’ has no attribute ‘ASGIDispatch’ The command ‘/bin/bash -o pipefail -c rasa train --force’ returned a non-zero code: 1

Hi Team, I am getting this below error, what is the fix. I am using 2.8.20-full version