Error(s) starting Jupyter Lab / Jupyter Notebook

Technical Topics
1

Hey Guys,

I am new here so I am not sure if this question was raised somewhere else, please pardon me if it is.

When I try to launch one of these I get these error messages:

Traceback (most recent call last):
File “C:\Users\hp\anaconda3\Scripts\jupyter-lab-script.py”, line 6, in
from jupyterlab.labapp import main
File “C:\Users\hp\anaconda3\Lib\site-packages\jupyterlab_init_.py”, line 7, in
from .handlers.announcements import ( # noqa
File “C:\Users\hp\anaconda3\Lib\site-packages\jupyterlab\handlers\announcements.py”, line 14, in
from jupyter_server.base.handlers import APIHandler
File “C:\Users\hp\anaconda3\Lib\site-packages\jupyter_server\base\handlers.py”, line 24, in
from tornado import web
File “C:\Users\hp\anaconda3\Lib\site-packages\tornado\web.py”, line 91, in
from tornado.httpserver import HTTPServer
File “C:\Users\hp\anaconda3\Lib\site-packages\tornado\httpserver.py”, line 32, in
from tornado.http1connection import HTTP1ServerConnection, HTTP1ConnectionParameters
File “C:\Users\hp\anaconda3\Lib\site-packages\tornado\http1connection.py”, line 34, in
from tornado import iostream
File “C:\Users\hp\anaconda3\Lib\site-packages\tornado\iostream.py”, line 40, in
from tornado.netutil import ssl_wrap_socket, _client_ssl_defaults, _server_ssl_defaults
File “C:\Users\hp\anaconda3\Lib\site-packages\tornado\netutil.py”, line 35, in
_client_ssl_defaults = ssl.create_default_context(ssl.Purpose.SERVER_AUTH)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File “C:\Users\hp\anaconda3\Lib\ssl.py”, line 775, in create_default_context
context.load_default_certs(purpose)
File “C:\Users\hp\anaconda3\Lib\ssl.py”, line 596, in load_default_certs
self._load_windows_store_certs(storename, purpose)
File “C:\Users\hp\anaconda3\Lib\ssl.py”, line 588, in _load_windows_store_certs
self.load_verify_locations(cadata=certs)
ssl.SSLError: not enough data: cadata does not contain a certificate (_ssl.c:4015)

And for Notebook:

Traceback (most recent call last):
File “C:\Users\hp\anaconda3\Scripts\jupyter-notebook-script.py”, line 6, in
from notebook.notebookapp import main
File “C:\Users\hp\anaconda3\Lib\site-packages\notebook\notebookapp.py”, line 59, in
from tornado import httpserver
File “C:\Users\hp\anaconda3\Lib\site-packages\tornado\httpserver.py”, line 32, in
from tornado.http1connection import HTTP1ServerConnection, HTTP1ConnectionParameters
File “C:\Users\hp\anaconda3\Lib\site-packages\tornado\http1connection.py”, line 34, in
from tornado import iostream
File “C:\Users\hp\anaconda3\Lib\site-packages\tornado\iostream.py”, line 40, in
from tornado.netutil import ssl_wrap_socket, _client_ssl_defaults, _server_ssl_defaults
File “C:\Users\hp\anaconda3\Lib\site-packages\tornado\netutil.py”, line 35, in
_client_ssl_defaults = ssl.create_default_context(ssl.Purpose.SERVER_AUTH)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File “C:\Users\hp\anaconda3\Lib\ssl.py”, line 775, in create_default_context
context.load_default_certs(purpose)
File “C:\Users\hp\anaconda3\Lib\ssl.py”, line 596, in load_default_certs
self._load_windows_store_certs(storename, purpose)
File “C:\Users\hp\anaconda3\Lib\ssl.py”, line 588, in _load_windows_store_certs
self.load_verify_locations(cadata=certs)
ssl.SSLError: [ASN1] nested asn1 error (_ssl.c:4030)

Any assistance or a link to the resolved issue is welcome! :raised_hands:

Thanks in advance :slight_smile:

2

Hi,

Thank you for the information and the screenshots, please try to follow these steps:

Go into the path C:\Users\UserName\anaconda3\Library\bin\

Once there copy the files libcrypto-1_1-x64.dll and libssl-1_1-x64.dll

Paste them into this directory: C:\Users\UserName\anaconda3\DLLs

Launch conda update --all on the Anaconda prompt

Please let us know if that fix your problem.

3

Hey @Carlos_Valin, thank you very much for looking into this for me!

Unfortunately, it won’t work. I’ve installed missing DLL’s :slight_smile:

Screenshot_1
Screenshot_1904×410 29.8 KB

But when I tried to update it in prompt I got this:

Collecting package metadata (current_repodata.json): failed

CondaSSLError: Encountered an SSL error. Most likely a certificate verification issue.

Exception: HTTPSConnectionPool(host=‘repo.anaconda.com’, port=443): Max retries exceeded with url: /pkgs/main/win-64/current_repodata.json (Caused by SSLError(“Can’t connect to HTTPS URL because the SSL module is not available.”))

It won’t launch Anaconda at all.

Thanks again! :raised_hands:

4

Wrong files, pardon! I’ve updated this, however, I cant launch it again. Will try to reinstall Anaconda now

5

Unfortunately, still similar response when I try to launch it:

Traceback (most recent call last):
File “C:\Users\hp\anaconda3\Scripts\jupyter-notebook-script.py”, line 6, in
from notebook.notebookapp import main
File “C:\Users\hp\anaconda3\Lib\site-packages\notebook\notebookapp.py”, line 59, in
from tornado import httpserver
File “”, line 1229, in handle_fromlist
File "C:\Users\hp\anaconda3\Lib\site-packages\tornado_init.py", line 66, in getattr
return importlib.import_module(“.” + name, name)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File “C:\Users\hp\anaconda3\Lib\importlib_init_.py”, line 126, in import_module
return _bootstrap.gcd_import(name[level:], package, level)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File “C:\Users\hp\anaconda3\Lib\site-packages\tornado\httpserver.py”, line 32, in
from tornado.http1connection import HTTP1ServerConnection, HTTP1ConnectionParameters
File “C:\Users\hp\anaconda3\Lib\site-packages\tornado\http1connection.py”, line 34, in
from tornado import iostream
File “”, line 1229, in handle_fromlist
File "C:\Users\hp\anaconda3\Lib\site-packages\tornado_init.py", line 66, in getattr
return importlib.import_module(“.” + name, name)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\hp\anaconda3\Lib\importlib_init.py", line 126, in import_module
return _bootstrap._gcd_import(name[level:], package, level)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File “C:\Users\hp\anaconda3\Lib\site-packages\tornado\iostream.py”, line 40, in
from tornado.netutil import ssl_wrap_socket, _client_ssl_defaults, _server_ssl_defaults
File “C:\Users\hp\anaconda3\Lib\site-packages\tornado\netutil.py”, line 35, in
_client_ssl_defaults = ssl.create_default_context(ssl.Purpose.SERVER_AUTH)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File “C:\Users\hp\anaconda3\Lib\ssl.py”, line 775, in create_default_context
context.load_default_certs(purpose)
File “C:\Users\hp\anaconda3\Lib\ssl.py”, line 596, in load_default_certs
self._load_windows_store_certs(storename, purpose)
File “C:\Users\hp\anaconda3\Lib\ssl.py”, line 588, in _load_windows_store_certs
self.load_verify_locations(cadata=certs)
ssl.SSLError: [ASN1] nested asn1 error (_ssl.c:4030)