Exporting notebook using Save and Export Notebook As raises "tuple" object is not callable from anyio

[kagesenshi]

Description

Exporting notebook using Save and Export Notebook As raises "tuple" object is not callable from anyio

Jan 17 00:32:28 hadoop.home.kagesenshi.org jupyterhub[177666]: [E 2022-01-17 00:32:28.408 SingleUserLabApp handlers:125] nbconvert failed: 'tuple' object is not callable
Jan 17 00:32:28 hadoop.home.kagesenshi.org jupyterhub[177666]:     Traceback (most recent call last):
Jan 17 00:32:28 hadoop.home.kagesenshi.org jupyterhub[177666]:       File "/opt/jupyterhub/lib64/python3.8/site-packages/jupyter_server/nbconvert/handlers.py", line 121, in get
Jan 17 00:32:28 hadoop.home.kagesenshi.org jupyterhub[177666]:         output, resources = await run_sync(
Jan 17 00:32:28 hadoop.home.kagesenshi.org jupyterhub[177666]:       File "/opt/jupyterhub/lib64/python3.8/site-packages/anyio/to_thread.py", line 28, in run_sync
Jan 17 00:32:28 hadoop.home.kagesenshi.org jupyterhub[177666]:         return await get_asynclib().run_sync_in_worker_thread(func, *args, cancellable=cancellable,
Jan 17 00:32:28 hadoop.home.kagesenshi.org jupyterhub[177666]:       File "/opt/jupyterhub/lib64/python3.8/site-packages/anyio/_backends/_asyncio.py", line 818, in run_sync_in_worker_thread
Jan 17 00:32:28 hadoop.home.kagesenshi.org jupyterhub[177666]:         return await future
Jan 17 00:32:28 hadoop.home.kagesenshi.org jupyterhub[177666]:       File "/opt/jupyterhub/lib64/python3.8/site-packages/anyio/_backends/_asyncio.py", line 754, in run
Jan 17 00:32:28 hadoop.home.kagesenshi.org jupyterhub[177666]:         result = context.run(func, *args)
Jan 17 00:32:28 hadoop.home.kagesenshi.org jupyterhub[177666]:     TypeError: 'tuple' object is not callable

running jupyter-nbconvert directly on CLI works fine however

Reproduce

1. Create a notebook
2. Click on Save and Export Notebook As > HTML

Expected behavior

HTML export successful

Context

• Operating System and version: Fedora 34
• Browser and version: Chrome 96
• JupyterLab version: 3.2.8

Setup is using python3.8 in virtualenv, through jupyterhub=2.0.2,

Troubleshoot Output

Paste the output from running `jupyter troubleshoot` from the command line here.
You may want to sanitize the paths in the output.
WARNING: You are using pip version 21.0.1; however, version 21.3.1 is available.

You should consider upgrading via the '/opt/jupyterhub/bin/python3.8 -m pip install --upgrade pip' command.

$PATH:

/opt/jupyterhub/bin/

/home/demo/.local/bin

/home/demo/bin

/usr/local/bin

/usr/bin

/usr/local/sbin

/usr/sbin
sys.path:

/opt/jupyterhub/bin

/usr/lib64/python38.zip

/usr/lib64/python3.8

/usr/lib64/python3.8/lib-dynload

/opt/jupyterhub/lib64/python3.8/site-packages

/opt/jupyterhub/lib/python3.8/site-packages
sys.executable:

/opt/jupyterhub/bin/python3.8
sys.version:

3.8.12 (default, Aug 30 2021, 00:00:00)

[GCC 11.2.1 20210728 (Red Hat 11.2.1-1)]
platform.platform():

Linux-5.11.12-300.fc34.x86_64-x86_64-with-glibc2.2.5
which -a jupyter:

/opt/jupyterhub/bin/jupyter
pip list:

Package                 Version

----------------------- ---------

aiohttp                 3.8.1

aiosignal               1.2.0

alembic                 1.7.5

anyio                   3.4.0

argon2-cffi             21.3.0

argon2-cffi-bindings    21.2.0

asttokens               2.0.5

async-generator         1.10

async-timeout           4.0.2

attrs                   21.4.0

Babel                   2.9.1

backcall                0.2.0

black                   21.12b0

bleach                  4.1.0

certifi                 2021.10.8

certipy                 0.1.3

cffi                    1.15.0

charset-normalizer      2.0.10

click                   8.0.3

colorama                0.4.4

cryptography            36.0.1

debugpy                 1.5.1

decorator               5.1.1

defusedxml              0.7.1

entrypoints             0.3

executing               0.8.2

frozenlist              1.2.0

gitdb                   4.0.9

GitPython               3.1.26

greenlet                1.1.2

idna                    3.3

importlib-metadata      4.10.0

importlib-resources     5.4.0

ipykernel               6.7.0

ipython                 8.0.0

ipython-genutils        0.2.0

jedi                    0.18.1

Jinja2                  3.0.3

json5                   0.9.6

jsonschema              4.4.0

jupyter-client          7.1.1

jupyter-core            4.9.1

jupyter-server          1.13.3

jupyter-server-mathjax  0.2.3

jupyter-server-proxy    3.2.0

jupyter-telemetry       0.1.0

jupyterhub              2.0.2

jupyterlab              3.2.8

jupyterlab-fasta        3.1.1

jupyterlab-geojson      3.1.2

jupyterlab-git          0.34.2

jupyterlab-katex        3.2.2

jupyterlab-latex        3.1.0

jupyterlab-mathjax3     4.2.2

jupyterlab-pullrequests 3.0.2

jupyterlab-pygments     0.1.2

jupyterlab-server       2.10.3

jupyterlab-vega2        3.1.3

jupyterlab-vega3        3.1.3

jupyterlab-widgets      1.0.2

Mako                    1.1.6

MarkupSafe              2.0.1

matplotlib-inline       0.1.3

mistune                 0.8.4

multidict               5.2.0

mypy-extensions         0.4.3

nbclassic               0.3.5

nbclient                0.5.10

nbconvert               6.4.0

nbdime                  3.1.1

nbformat                5.1.3

nest-asyncio            1.5.4

notebook                6.4.7

oauthlib                3.1.1

packaging               21.3

pamela                  1.0.0

pandocfilters           1.5.0

parso                   0.8.3

pathspec                0.9.0

pexpect                 4.8.0

pickleshare             0.7.5

pip                     21.0.1

platformdirs            2.4.1

prometheus-client       0.12.0

prompt-toolkit          3.0.24

psycopg2-binary         2.9.3

ptyprocess              0.7.0

pure-eval               0.2.1

pycparser               2.21

Pygments                2.11.2

pymssql                 2.2.3

pyOpenSSL               21.0.0

pyparsing               3.0.6

pyrsistent              0.18.1

python-dateutil         2.8.2

python-json-logger      2.0.2

pytz                    2021.3

pyzmq                   22.3.0

requests                2.27.1

ruamel.yaml             0.17.20

ruamel.yaml.clib        0.2.6

Send2Trash              1.8.0

setuptools              53.0.0

simpervisor             0.4

six                     1.16.0

smmap                   5.0.0

sniffio                 1.2.0

SQLAlchemy              1.4.29

stack-data              0.1.4

terminado               0.12.1

testpath                0.5.0

tomli                   1.2.3

tornado                 6.1

traitlets               5.1.1

typing-extensions       4.0.1

urllib3                 1.26.8

wcwidth                 0.2.5

webencodings            0.5.1

websocket-client        1.2.3

yarl                    1.7.2

zipp                    3.7.0

Command Line Output

Paste the output from your command line running `jupyter lab` here, use `--debug` if possible.
[D 2022-01-17 00:42:30.277 ServerApp] Searching ['/home/demo', '/home/demo/.jupyter', '/opt/jupyterhub/etc/jupyter', '/usr/local/etc/jupyter', '/etc/jupyter'] for config files

[D 2022-01-17 00:42:30.277 ServerApp] Looking for jupyter_config in /etc/jupyter

[D 2022-01-17 00:42:30.278 ServerApp] Looking for jupyter_config in /usr/local/etc/jupyter

[D 2022-01-17 00:42:30.278 ServerApp] Looking for jupyter_config in /opt/jupyterhub/etc/jupyter

[D 2022-01-17 00:42:30.278 ServerApp] Looking for jupyter_config in /home/demo/.jupyter

[D 2022-01-17 00:42:30.278 ServerApp] Looking for jupyter_config in /home/demo

[D 2022-01-17 00:42:30.279 ServerApp] Looking for jupyter_server_config in /etc/jupyter

[D 2022-01-17 00:42:30.279 ServerApp] Looking for jupyter_server_config in /usr/local/etc/jupyter

[D 2022-01-17 00:42:30.279 ServerApp] Looking for jupyter_server_config in /opt/jupyterhub/etc/jupyter

[D 2022-01-17 00:42:30.279 ServerApp] Looking for jupyter_server_config in /home/demo/.jupyter

[D 2022-01-17 00:42:30.279 ServerApp] Loaded config file: /home/demo/.jupyter/jupyter_server_config.json

[D 2022-01-17 00:42:30.279 ServerApp] Looking for jupyter_server_config in /home/demo

[D 2022-01-17 00:42:30.281 ServerApp] Paths used for configuration of jupyter_server_config:

/etc/jupyter/jupyter_server_config.json

[D 2022-01-17 00:42:30.281 ServerApp] Paths used for configuration of jupyter_server_config:

/usr/local/etc/jupyter/jupyter_server_config.json

[D 2022-01-17 00:42:30.281 ServerApp] Paths used for configuration of jupyter_server_config:

/opt/jupyterhub/etc/jupyter/jupyter_server_config.d/jupyter-server-proxy-jupyterserverextension.json

/opt/jupyterhub/etc/jupyter/jupyter_server_config.d/jupyter_server_mathjax.json

/opt/jupyterhub/etc/jupyter/jupyter_server_config.d/jupyterlab.json

/opt/jupyterhub/etc/jupyter/jupyter_server_config.d/jupyterlab_git.json

/opt/jupyterhub/etc/jupyter/jupyter_server_config.d/jupyterlab_latex.json

/opt/jupyterhub/etc/jupyter/jupyter_server_config.d/jupyterlab_pullrequests_server.json

/opt/jupyterhub/etc/jupyter/jupyter_server_config.d/nbclassic.json

/opt/jupyterhub/etc/jupyter/jupyter_server_config.d/nbdime.json

/opt/jupyterhub/etc/jupyter/jupyter_server_config.json

[D 2022-01-17 00:42:30.282 ServerApp] Paths used for configuration of jupyter_server_config:

/home/demo/.jupyter/jupyter_server_config.json

/opt/jupyterhub/lib64/python3.8/site-packages/jupyter_server_mathjax/app.py:40: FutureWarning: The alias _() will be deprecated. Use _i18n() instead.

help=("""The MathJax.js configuration file that is to be used."""),

[D 2022-01-17 00:42:30.524 MathJaxExtension] Config changed: {'ServerApp': {'ip': '0.0.0.0', 'log_level': 'DEBUG', 'password': 'argon2:$argon2id$v=19$m=10240,t=10,p=8$1l/BEPsceo2H5MHQ+o9smA$ljoMSWVCyiKjAaUKVFld5Wtx4mJ+HPh/p5jYuRAhXpw', 'jpserver_extensions': <LazyConfigValue {'update': {'jupyter_server_mathjax': True, 'jupyter_server_proxy': True, 'jupyterlab_git': True, 'jupyterlab_latex': True, 'jupyterlab_pullrequests': True, 'nbclassic': True, 'nbdime': True}}>}, 'ExtensionApp': {'log_level': 'DEBUG'}}

[D 2022-01-17 00:42:30.525 ServerApp] Config changed: {'ServerApp': {'ip': '0.0.0.0', 'log_level': 'DEBUG', 'password': 'argon2:$argon2id$v=19$m=10240,t=10,p=8$1l/BEPsceo2H5MHQ+o9smA$ljoMSWVCyiKjAaUKVFld5Wtx4mJ+HPh/p5jYuRAhXpw', 'jpserver_extensions': <LazyConfigValue value={'jupyterlab': True, 'jupyter_server_mathjax': True, 'jupyter_server_proxy': True, 'jupyterlab_git': True, 'jupyterlab_latex': True, 'jupyterlab_pullrequests': True, 'nbclassic': True, 'nbdime': True}>}, 'ExtensionApp': {'log_level': 'DEBUG'}}

[I 2022-01-17 00:42:30.525 ServerApp] jupyter_server_mathjax | extension was successfully linked.

[I 2022-01-17 00:42:30.526 ServerApp] jupyter_server_proxy | extension was successfully linked.

[D 2022-01-17 00:42:30.534 LabApp] Config changed: {'NotebookApp': {}, 'ServerApp': {'ip': '0.0.0.0', 'log_level': 'DEBUG', 'password': 'argon2:$argon2id$v=19$m=10240,t=10,p=8$1l/BEPsceo2H5MHQ+o9smA$ljoMSWVCyiKjAaUKVFld5Wtx4mJ+HPh/p5jYuRAhXpw', 'jpserver_extensions': <LazyConfigValue value={'jupyterlab': True, 'jupyter_server_mathjax': True, 'jupyter_server_proxy': True, 'jupyterlab_git': True, 'jupyterlab_latex': True, 'jupyterlab_pullrequests': True, 'nbclassic': True, 'nbdime': True}>}, 'ExtensionApp': {'log_level': 'DEBUG'}}

[I 2022-01-17 00:42:30.534 ServerApp] jupyterlab | extension was successfully linked.

[I 2022-01-17 00:42:30.534 ServerApp] jupyterlab_git | extension was successfully linked.

[I 2022-01-17 00:42:30.534 ServerApp] jupyterlab_latex | extension was successfully linked.

[I 2022-01-17 00:42:30.534 ServerApp] jupyterlab_pullrequests | extension was successfully linked.

[D 2022-01-17 00:42:30.541 NotebookApp] Config changed: {'NotebookApp': {}, 'ServerApp': {'ip': '0.0.0.0', 'log_level': 'DEBUG', 'password': 'argon2:$argon2id$v=19$m=10240,t=10,p=8$1l/BEPsceo2H5MHQ+o9smA$ljoMSWVCyiKjAaUKVFld5Wtx4mJ+HPh/p5jYuRAhXpw', 'jpserver_extensions': <LazyConfigValue value={'jupyterlab': True, 'jupyter_server_mathjax': True, 'jupyter_server_proxy': True, 'jupyterlab_git': True, 'jupyterlab_latex': True, 'jupyterlab_pullrequests': True, 'nbclassic': True, 'nbdime': True}>}, 'ExtensionApp': {'log_level': 'DEBUG'}}

[D 2022-01-17 00:42:30.965 ServerApp] Paths used for configuration of jupyter_notebook_config:

/home/demo/.jupyter/jupyter_notebook_config.json

[D 2022-01-17 00:42:30.965 ServerApp] Paths used for configuration of jupyter_notebook_config:

/etc/jupyter/jupyter_notebook_config.json

[D 2022-01-17 00:42:30.965 ServerApp] Paths used for configuration of jupyter_notebook_config:

/usr/local/etc/jupyter/jupyter_notebook_config.json

[D 2022-01-17 00:42:30.966 ServerApp] Paths used for configuration of jupyter_notebook_config:

/opt/jupyterhub/etc/jupyter/jupyter_notebook_config.d/jupyter-server-proxy-notebookserverextension.json

/opt/jupyterhub/etc/jupyter/jupyter_notebook_config.d/jupyterlab.json

/opt/jupyterhub/etc/jupyter/jupyter_notebook_config.d/jupyterlab_git.json

/opt/jupyterhub/etc/jupyter/jupyter_notebook_config.d/jupyterlab_latex.json

/opt/jupyterhub/etc/jupyter/jupyter_notebook_config.d/jupyterlab_pullrequests_notebook.json

/opt/jupyterhub/etc/jupyter/jupyter_notebook_config.d/nbdime.json

/opt/jupyterhub/etc/jupyter/jupyter_notebook_config.json

[D 2022-01-17 00:42:30.966 ServerApp] Paths used for configuration of jupyter_notebook_config:

/home/demo/.jupyter/jupyter_notebook_config.json

[I 2022-01-17 00:42:30.966 ServerApp] nbclassic | extension was successfully linked.

[I 2022-01-17 00:42:30.966 ServerApp] nbdime | extension was successfully linked.

[D 2022-01-17 00:42:30.967 ServerApp] Config changed: {'ExtensionApp': {'log_level': 'DEBUG'}, 'NotebookApp': {}, 'ServerApp': {'ip': '0.0.0.0', 'log_level': 'DEBUG', 'password': 'argon2:$argon2id$v=19$m=10240,t=10,p=8$1l/BEPsceo2H5MHQ+o9smA$ljoMSWVCyiKjAaUKVFld5Wtx4mJ+HPh/p5jYuRAhXpw', 'jpserver_extensions': <LazyConfigValue value={'jupyterlab': True, 'jupyter_server_mathjax': True, 'jupyter_server_proxy': True, 'jupyterlab_git': True, 'jupyterlab_latex': True, 'jupyterlab_pullrequests': True, 'nbclassic': True, 'nbdime': True}>}}

[D 2022-01-17 00:42:30.967 ServerApp] Raising open file limit: soft 1024->4096; hard 524288->524288

[I 2022-01-17 00:42:30.991 ServerApp] nbclassic | extension was successfully loaded.

[I 2022-01-17 00:42:30.992 ServerApp] jupyter_server_mathjax | extension was successfully loaded.

[I 2022-01-17 00:42:30.997 ServerApp] jupyter_server_proxy | extension was successfully loaded.

[I 2022-01-17 00:42:30.998 LabApp] JupyterLab extension loaded from /opt/jupyterhub/lib64/python3.8/site-packages/jupyterlab

[I 2022-01-17 00:42:30.998 LabApp] JupyterLab application directory is /opt/jupyterhub/share/jupyter/lab

[I 2022-01-17 00:42:31.001 ServerApp] jupyterlab | extension was successfully loaded.

[I 2022-01-17 00:42:31.005 ServerApp] jupyterlab_git | extension was successfully loaded.

[I 2022-01-17 00:42:31.007 ServerApp] jupyterlab_latex | extension was successfully loaded.

PR Manager Class <function get_github_manager at 0x7f081ec09d30>

[I 2022-01-17 00:42:31.019 ServerApp] Registered jupyterlab_pullrequests extension

[I 2022-01-17 00:42:31.019 ServerApp] jupyterlab_pullrequests | extension was successfully loaded.

[D 2022-01-17 00:42:31.115 ServerApp] Using default logger

[D 2022-01-17 00:42:31.116 ServerApp] Using default logger

[D 2022-01-17 00:42:31.116 ServerApp] Using default logger

[D 2022-01-17 00:42:31.116 ServerApp] Using default logger

[D 2022-01-17 00:42:31.116 ServerApp] Using default logger

[I 2022-01-17 00:42:31.117 ServerApp] nbdime | extension was successfully loaded.

[I 2022-01-17 00:42:31.117 ServerApp] Serving notebooks from local directory: /home/demo

[I 2022-01-17 00:42:31.117 ServerApp] Jupyter Server 1.13.3 is running at:

[I 2022-01-17 00:42:31.117 ServerApp] http://hadoop.home.kagesenshi.org:8888/lab

[I 2022-01-17 00:42:31.117 ServerApp]  or http://127.0.0.1:8888/lab

[I 2022-01-17 00:42:31.117 ServerApp] Use Control-C to stop this server and shut down all kernels (twice to skip confirmation).

[W 2022-01-17 00:42:31.120 ServerApp] No web browser found: could not locate runnable browser.

[W 2022-01-17 00:42:34.321 ServerApp] Clearing invalid/expired login cookie username-10-210-14-53-8888

[W 2022-01-17 00:42:34.322 ServerApp] Clearing invalid/expired login cookie username-10-210-14-53-8888

[I 2022-01-17 00:42:34.322 ServerApp] 302 GET /nbconvert/html/simulasi_1_2.ipynb?download=true (10.210.14.99) 1.57ms

[D 2022-01-17 00:42:34.325 ServerApp] Using contents: services/contents

[D 2022-01-17 00:42:34.344 ServerApp] Path favicon.ico served from /opt/jupyterhub/lib64/python3.8/site-packages/jupyter_server/static/favicon.ico

[D 2022-01-17 00:42:34.345 ServerApp] Path style/bootstrap.min.css served from /opt/jupyterhub/lib64/python3.8/site-packages/jupyter_server/static/style/bootstrap.min.css

[D 2022-01-17 00:42:34.345 ServerApp] Path style/bootstrap-theme.min.css served from /opt/jupyterhub/lib64/python3.8/site-packages/jupyter_server/static/style/bootstrap-theme.min.css

[D 2022-01-17 00:42:34.345 ServerApp] Path style/index.css served from /opt/jupyterhub/lib64/python3.8/site-packages/jupyter_server/static/style/index.css

[D 2022-01-17 00:42:34.345 ServerApp] Path logo/logo.png served from /opt/jupyterhub/lib64/python3.8/site-packages/jupyter_server/static/logo/logo.png

[D 2022-01-17 00:42:34.346 ServerApp] 200 GET /login?next=%2Fnbconvert%2Fhtml%2Fsimulasi_1_2.ipynb%3Fdownload%3Dtrue (10.210.14.99) 22.33ms

[I 2022-01-17 00:42:37.884 ServerApp] 302 POST /login?next=%2Fnbconvert%2Fhtml%2Fsimulasi_1_2.ipynb%3Fdownload%3Dtrue (10.210.14.99) 43.39ms

[D 2022-01-17 00:42:37.978 ServerApp] Template paths:

/opt/jupyterhub/share/jupyter/nbconvert/templates/lab

/opt/jupyterhub/share/jupyter/nbconvert/templates/base

/home/demo/.local/share/jupyter

/home/demo/.local/share/jupyter/nbconvert/templates

/home/demo/.local/share/jupyter/nbconvert/templates/compatibility

/opt/jupyterhub/share/jupyter

/opt/jupyterhub/share/jupyter/nbconvert/templates

/opt/jupyterhub/share/jupyter/nbconvert/templates/compatibility

/usr/local/share/jupyter

/usr/local/share/jupyter/nbconvert/templates

/usr/local/share/jupyter/nbconvert/templates/compatibility

/usr/share/jupyter

/usr/share/jupyter/nbconvert/templates

/usr/share/jupyter/nbconvert/templates/compatibility

/opt/jupyterhub/share/jupyter/nbconvert/templates

[D 2022-01-17 00:42:37.981 ServerApp] Applying preprocessor: TagRemovePreprocessor

[D 2022-01-17 00:42:37.986 ServerApp] Applying preprocessor: RegexRemovePreprocessor

[D 2022-01-17 00:42:38.003 ServerApp] Applying preprocessor: coalesce_streams

[D 2022-01-17 00:42:38.020 ServerApp] Applying preprocessor: HighlightMagicsPreprocessor

[D 2022-01-17 00:42:38.036 ServerApp] Applying preprocessor: CSSHTMLHeaderPreprocessor

[D 2022-01-17 00:42:38.042 ServerApp] Attempting to load template index.html.j2

[D 2022-01-17 00:42:38.042 ServerApp]     template_paths: /opt/jupyterhub/share/jupyter/nbconvert/templates/lab:/opt/jupyterhub/share/jupyter/nbconvert/templates/base:/home/demo/.local/share/jupyter:/home/demo/.local/share/jupyter/nbconvert/templates:/home/demo/.local/share/jupyter/nbconvert/templates/compatibility:/opt/jupyterhub/share/jupyter:/opt/jupyterhub/share/jupyter/nbconvert/templates:/opt/jupyterhub/share/jupyter/nbconvert/templates/compatibility:/usr/local/share/jupyter:/usr/local/share/jupyter/nbconvert/templates:/usr/local/share/jupyter/nbconvert/templates/compatibility:/usr/share/jupyter:/usr/share/jupyter/nbconvert/templates:/usr/share/jupyter/nbconvert/templates/compatibility:/opt/jupyterhub/share/jupyter/nbconvert/templates

[E 2022-01-17 00:42:38.174 ServerApp] nbconvert failed: 'tuple' object is not callable

Traceback (most recent call last):

File "/opt/jupyterhub/lib64/python3.8/site-packages/jupyter_server/nbconvert/handlers.py", line 121, in get

output, resources = await run_sync(

File "/opt/jupyterhub/lib64/python3.8/site-packages/anyio/to_thread.py", line 28, in run_sync

return await get_asynclib().run_sync_in_worker_thread(func, args, cancellable=cancellable,

File "/opt/jupyterhub/lib64/python3.8/site-packages/anyio/_backends/_asyncio.py", line 818, in run_sync_in_worker_thread

return await future

File "/opt/jupyterhub/lib64/python3.8/site-packages/anyio/_backends/_asyncio.py", line 754, in run

result = context.run(func, args)

TypeError: 'tuple' object is not callable

[W 2022-01-17 00:42:38.175 ServerApp] 500 GET /nbconvert/html/simulasi_1_2.ipynb?download=true (10.210.14.99): nbconvert failed: 'tuple' object is not callable

[D 2022-01-17 00:42:38.175 ServerApp] Using contents: services/contents

[D 2022-01-17 00:42:38.175 ServerApp] Using contents: services/contents

[E 2022-01-17 00:42:38.178 ServerApp] {

"Host": "10.210.14.53:8888",

"Connection": "keep-alive",

"Cache-Control": "max-age=0",

"Upgrade-Insecure-Requests": "1",

"User-Agent": "Mozilla/5.0 (X11; Fedora; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/96.0.4664.45 Safari/537.36",

"Accept": "text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,/;q=0.8,application/signed-exchange;v=b3;q=0.9",

"Referer": "http://10.210.14.53:8888/login?next=%2Fnbconvert%2Fhtml%2Fsimulasi_1_2.ipynb%3Fdownload%3Dtrue",

"Accept-Encoding": "gzip, deflate",

"Accept-Language": "en-US,en;q=0.9",

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}

[E 2022-01-17 00:42:38.178 ServerApp] 500 GET /nbconvert/html/simulasi_1_2.ipynb?download=true (10.210.14.99) 292.17ms referer=http://10.210.14.53:8888/login?next=%2Fnbconvert%2Fhtml%2Fsimulasi_1_2.ipynb%3Fdownload%3Dtrue

[D 2022-01-17 00:42:39.960 ServerApp] Initializing websocket connection /api/kernels/c5749d67-3a10-47b1-a36e-6e7204abeec5/channels

[W 2022-01-17 00:42:39.961 ServerApp] 404 GET /api/kernels/c5749d67-3a10-47b1-a36e-6e7204abeec5/channels?session_id=3f7815cc-74e5-4945-a6cb-6e544d87790e (10.210.14.99): Kernel does not exist: c5749d67-3a10-47b1-a36e-6e7204abeec5

[D 2022-01-17 00:42:39.961 ServerApp] Using contents: services/contents

[W 2022-01-17 00:42:39.963 ServerApp] 404 GET /api/kernels/c5749d67-3a10-47b1-a36e-6e7204abeec5/channels?session_id=3f7815cc-74e5-4945-a6cb-6e544d87790e (10.210.14.99) 3.91ms referer=None

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[davidbrochart]

Thanks for reporting, I opened jupyter-server/jupyter_server#667.