我在启动 Jupyter 并尝试打开或创建笔记本时遇到 500：内部服务器错误。我在这里检查了多个线程，但没有任何效果。我还尝试从 PyCharm 和命令行安装、重新安装、安装。我也使用了 Juypter 官方网站上的步骤。我使用 pip 安装它，而不是 conda（我的解释器是 3.6）。我运行了故障排除命令。这是我的输出：
C:\Users\User>jupyter troubleshoot
$PATH:
c:\program files\python36\lib\site-packages\pywin32_system32
C:\Program Files (x86)\Common Files\Intel\Shared Libraries\redist\intel64\compiler
C:\Program Files\NVIDIA GPU Computing Toolkit\CUDA\v10.1\bin
C:\Program Files\NVIDIA GPU Computing Toolkit\CUDA\v10.1\libnvvp
C:\Program Files\Python36\Scripts\
C:\Program Files\Python36\
C:\Program Files\NVIDIA GPU Computing Toolkit\CUDA\v11.1\bin
C:\Program Files\NVIDIA GPU Computing Toolkit\CUDA\v11.1\libnvvp
C:\Windows\system32
C:\Windows
C:\Windows\System32\Wbem
C:\Windows\System32\WindowsPowerShell\v1.0\
C:\Windows\System32\OpenSSH\
C:\Program Files (x86)\NVIDIA Corporation\PhysX\Common
C:\Program Files\NVIDIA Corporation\NVIDIA NGX
C:\Program Files\NVIDIA Corporation\NVIDIA NvDLISR
C:\WINDOWS\system32
C:\WINDOWS
C:\WINDOWS\System32\Wbem
C:\WINDOWS\System32\WindowsPowerShell\v1.0\
C:\WINDOWS\System32\OpenSSH\
C:\Program Files\NVIDIA Corporation\Nsight Compute 2019.1\
C:\ProgramData\chocolatey\bin
C:\Users\User\AppData\Local\Microsoft\WindowsApps
C:\Program Files\JetBrains\PyCharm 2020.2.4\bin
sys.path:
C:\Program Files\Python36\Scripts\jupyter-troubleshoot.EXE
c:\program files\python36\python36.zip
c:\program files\python36\DLLs
c:\program files\python36\lib
c:\program files\python36
C:\Users\User\AppData\Roaming\Python\Python36\site-packages
c:\program files\python36\lib\site-packages
c:\program files\python36\lib\site-packages\win32
c:\program files\python36\lib\site-packages\win32\lib
c:\program files\python36\lib\site-packages\Pythonwin
sys.executable:
c:\program files\python36\python.exe
sys.version:
3.6.0 (v3.6.0:41df79263a11, Dec 23 2016, 08:06:12) [MSC v.1900 64 bit (AMD64)]
platform.platform():
Windows-10-10.0.17763-SP0
where jupyter:
C:\Program Files\Python36\Scripts\jupyter.exe
pip list:
Package Version
----------------------------- ----------
absl-py 0.11.0
alabaster 0.7.12
alembic 1.4.3
altair 4.1.0
argon2-cffi 20.1.0
astor 0.8.1
astunparse 1.6.3
async-generator 1.10
attrs 20.3.0
Babel 2.9.0
backcall 0.2.0
base58 2.0.1
bleach 3.2.1
blinker 1.4
blis 0.7.3
cached-property 1.5.2
cachetools 4.1.1
catalogue 1.0.0
certifi 2020.11.8
certipy 0.1.3
cffi 1.14.4
chardet 3.0.4
click 7.1.2
colorama 0.4.4
cryptography 3.3.1
cycler 0.10.0
cymem 2.0.4
decorator 4.4.2
defusedxml 0.6.0
dlatk 1.1.8
docutils 0.16
en-core-web-sm 2.3.1
entrypoints 0.3
gast 0.3.3
gitdb 4.0.5
GitPython 3.1.11
google-auth 1.23.0
google-auth-oauthlib 0.4.2
google-pasta 0.2.0
grpcio 1.33.2
h5py 2.10.0
ibm-cloud-sdk-core 1.7.3
ibm-watson 4.7.1
idna 2.10
imagesize 1.2.0
importlib-metadata 3.1.0
ipykernel 5.3.4
ipyparallel 6.3.0
ipython 7.16.1
ipython-genutils 0.2.0
ipywidgets 7.5.1
jedi 0.17.2
Jinja2 2.11.2
joblib 0.17.0
json5 0.9.5
jsonschema 3.2.0
jupyter-client 6.1.7
jupyter-core 4.7.0
jupyter-telemetry 0.1.0
jupyterhub 1.3.0
jupyterlab 2.2.9
jupyterlab-pygments 0.1.2
jupyterlab-server 1.2.0
Keras 2.3.1
Keras-Applications 1.0.8
Keras-Preprocessing 1.1.2
kiwisolver 1.3.1
Mako 1.1.3
Markdown 3.3.3
MarkupSafe 1.1.1
matplotlib 3.3.3
mistune 0.8.4
murmurhash 1.0.4
mysqlclient 2.0.1
nbclient 0.5.1
nbconvert 6.0.7
nbformat 5.0.8
nest-asyncio 1.4.3
nltk 3.5
nose 1.3.7
notebook 6.1.5
numpy 1.18.5
oauthlib 3.1.0
opencv-python 4.1.2.30
opt-einsum 3.3.0
packaging 20.7
pandas 0.25.3
pandocfilters 1.4.3
parso 0.7.1
pathtools 0.1.2
patsy 0.5.1
pickleshare 0.7.5
Pillow 8.0.1
pip 20.3.1
pip-autoremove 0.9.1
plac 1.1.3
plotly 4.13.0
preshed 3.0.4
prometheus-client 0.9.0
prompt-toolkit 3.0.3
protobuf 3.14.0
psutil 5.7.3
pyarrow 2.0.0
pyasn1 0.4.8
pyasn1-modules 0.2.8
pycparser 2.20
pydeck 0.5.0
Pygments 2.7.2
PyJWT 1.7.1
pyOpenSSL 20.0.0
pyparsing 2.4.7
pyrsistent 0.17.3
PySocks 1.7.1
python-dateutil 2.8.1
python-editor 1.0.4
python-json-logger 2.0.1
pytz 2020.4
pywin32 300
pywinpty 0.5.7
PyYAML 5.3.1
pyzmq 20.0.0
regex 2020.11.13
requests 2.25.0
requests-oauthlib 1.3.0
retrying 1.3.3
rsa 4.6
ruamel.yaml 0.16.12
ruamel.yaml.clib 0.2.2
scikit-learn 0.18.2
scipy 1.5.4
Send2Trash 1.5.0
setuptools 50.3.2
six 1.15.0
sklearn 0.0
smmap 3.0.4
snowballstemmer 2.0.0
spacy 2.3.4
Sphinx 3.3.1
sphinxcontrib-applehelp 1.0.2
sphinxcontrib-devhelp 1.0.2
sphinxcontrib-htmlhelp 1.0.3
sphinxcontrib-jsmath 1.0.1
sphinxcontrib-qthelp 1.0.3
sphinxcontrib-serializinghtml 1.1.4
SQLAlchemy 1.3.20
srsly 1.0.4
statsmodels 0.12.1
streamlit 0.72.0
tensorboard 2.4.0
tensorboard-plugin-wit 1.7.0
tensorflow 2.3.1
tensorflow-estimator 2.3.0
tensorflow-gpu-estimator 2.3.0
termcolor 1.1.0
terminado 0.9.1
testpath 0.4.4
textblob 0.15.3
thinc 7.4.3
threadpoolctl 2.1.0
toml 0.10.2
toolz 0.11.1
tornado 6.1
tqdm 4.54.0
traitlets 4.3.3
tweepy 3.9.0
tzlocal 2.1
urllib3 1.26.2
vaderSentiment 3.3.2
validators 0.18.1
wasabi 0.8.0
watchdog 0.10.4
wcwidth 0.2.5
webencodings 0.5.1
websocket-client 0.48.0
Werkzeug 1.0.1
wheel 0.36.0
widgetsnbextension 3.5.1
wrapt 1.12.1
zipp 3.4.0
在我的错误日志中，我发现了以下问题（由于文本限制，我无法在此处写完整的日志）：
[W 21:45:31.216 NotebookApp] Error loading server extension ipyparallel.nbextension
ModuleNotFoundError: No module named 'contextvars'
ImportError: cannot import name 'AsyncGenerator'