cannot import name 'Protocol' about application HOT 2 CLOSED

下面是我的库的版本
packages in environment at D:\ProgramData\Anaconda3\envs\robot:
Name Version Build Channel
aiohttp 3.7.4.post0 pypi_0 pypi
async-timeout 3.0.1 pypi_0 pypi
attrs 21.2.0 pypi_0 pypi
certifi 2021.5.30 py36haa95532_0
chardet 4.0.0 pypi_0 pypi
charset-normalizer 2.0.2 pypi_0 pypi
contextvars 2.4 pypi_0 pypi
dataclasses 0.8 pypi_0 pypi
graia-application-mirai 0.20.1 pypi_0 pypi
graia-broadcast 0.11.3 pypi_0 pypi
idna 3.2 pypi_0 pypi
idna-ssl 1.1.0 pypi_0 pypi
immutables 0.15 pypi_0 pypi
multidict 5.1.0 pypi_0 pypi
pip 21.1.3 py36haa95532_0
pydantic 1.8.2 pypi_0 pypi
python 3.6.13 h3758d61_0
regex 2020.11.13 pypi_0 pypi
requests 2.26.0 pypi_0 pypi
setuptools 52.0.0 py36haa95532_0
sqlite 3.36.0 h2bbff1b_0
typing-extensions 3.10.0.0 pypi_0 pypi
urllib3 1.26.6 pypi_0 pypi
vc 14.2 h21ff451_1
vs2015_runtime 14.27.29016 h5e58377_2
wheel 0.36.2 pyhd3eb1b0_0
wincertstore 0.2 py36h7fe50ca_0
yarl 1.6.3 pypi_0 pypi

from application.

已解决，版本不匹配，退回graia-application-maria==0.19版本就OK了

from application.