Notebook: Problem to launch jupyter notebook

[nenadzi]

Hi everyone,
I've already installed anaconda and start up anaconda prompt, but I cant start jupyter notebook in any way.
Also, I can't initiated anaconda navigator, anaconda prompt has recognised only
OS is W10.
Firewall is turn off.
message below
Many thanks

(base) C:Usersnenadzi>jupyter notebook

Traceback (most recent call last):

File "C:UsersnenadziAppDataLocalContinuumanaconda3Scriptsjupyter-notebook-script.py", line 6, in

from notebook.notebookapp import main

File "C:UsersnenadziAppDataLocalContinuumanaconda3libsite-packagesnotebooknotebookapp.py", line 61, in

from tornado import httpserver

File "C:UsersnenadziAppDataLocalContinuumanaconda3libsite-packagestornadohttpserver.py", line 33, in

from tornado.http1connection import HTTP1ServerConnection, HTTP1ConnectionParameters

File "C:UsersnenadziAppDataLocalContinuumanaconda3libsite-packagestornadohttp1connection.py", line 31, in

from tornado import iostream

File "C:UsersnenadziAppDataLocalContinuumanaconda3libsite-packagestornadoiostream.py", line 41, in

from tornado.netutil import ssl_wrap_socket, _client_ssl_defaults, _server_ssl_defaults

File "C:UsersnenadziAppDataLocalContinuumanaconda3libsite-packagestornadonetutil.py", line 45, in

ssl.Purpose.SERVER_AUTH)

File "C:UsersnenadziAppDataLocalContinuumanaconda3libssl.py", line 578, in create_default_context

context.load_default_certs(purpose)

File "C:UsersnenadziAppDataLocalContinuumanaconda3libssl.py", line 479, in load_default_certs

self._load_windows_store_certs(storename, purpose)

File "C:UsersnenadziAppDataLocalContinuumanaconda3libssl.py", line 471, in _load_windows_store_certs

self.load_verify_locations(cadata=certs)

ssl.SSLError: nested asn1 error (_ssl.c:3840)

(base) C:Usersnenadzi>

[thomasaarholt]

I have no proper idea to suggest, but try updating the notebook with conda install notebook in the cmd prompt.

[nenadzi]

Hi Thomas

Hi Thomas
Thanks for suggestion, but unfortunately nothing happened.
I've tried the same instruction in the Anaconda Prompt, also
BR

[Yassica]

Nenadzi, have you managed to solve this problem? I have the same problem with running jupyter notebook. I used to have all up and running, both anaconda 2 and anaconda 3 installed and then I have decided to re-install all and work only with anaconda 3 and now I can not make jupyter notebook work again . Log is bellow. Can somebody or you help? Thnx

---

Traceback (most recent call last):
File "C:UsersUSERNAMEAppDataLocalContinuumanaconda3Scriptsjupyter-notebook-script.py", line 6, in
from notebook.notebookapp import main
File "C:UsersUSERNAMEAppDataLocalContinuumanaconda3libsite-packagesnotebooknotebookapp.py", line 61, in
from tornado import httpserver
File "C:UsersUSERNAMEAppDataLocalContinuumanaconda3libsite-packagestornadohttpserver.py", line 33, in
from tornado.http1connection import HTTP1ServerConnection, HTTP1ConnectionParameters
File "C:UsersUSERNAMEAppDataLocalContinuumanaconda3libsite-packagestornadohttp1connection.py", line 31, in
from tornado import iostream
File "C:UsersUSERNAMEAppDataLocalContinuumanaconda3libsite-packagestornadoiostream.py", line 41, in
from tornado.netutil import ssl_wrap_socket, _client_ssl_defaults, _server_ssl_defaults
File "C:UsersUSERNAMEAppDataLocalContinuumanaconda3libsite-packagestornadonetutil.py", line 45, in
ssl.Purpose.SERVER_AUTH)
File "C:UsersUSERNAMEAppDataLocalContinuumanaconda3libssl.py", line 578, in create_default_context
context.load_default_certs(purpose)
File "C:UsersUSERNAMEAppDataLocalContinuumanaconda3libssl.py", line 479, in load_default_certs
self._load_windows_store_certs(storename, purpose)
File "C:UsersUSERNAMEAppDataLocalContinuumanaconda3libssl.py", line 471, in _load_windows_store_certs
self.load_verify_locations(cadata=certs)
ssl.SSLError: nested asn1 error (_ssl.c:3840)

[pedjaziv]

Ok, I have the exact message (except the user name part)... I've tried what you've suggested over here, but nothing helped :(

Is anyone found solution by now?

Thank in advance

[PaleNeutron]

@pedjaziv , look into my comment here.

[r4m0]

@pedjaziv
I manage to solve this problem by removing the:
if certs: self.load_verify_locations(cadata=certs)
from file "C:UsersUSERNAMEAppDataLocalContinuumanaconda3libssl.py", lines 470 and 471

[pedjaziv]

@pedjaziv
I manage to solve this problem by removing the:
if certs: self.load_verify_locations(cadata=certs)
from file "C:UsersUSERNAMEAppDataLocalContinuumanaconda3libssl.py", lines 470 and 471

Thanks @r4m0 . This actually solved my problem.
I can verify that this problem is caused with certs from Serbian authorities.

Nicknames of people having a same problem indicates that this was an issue related to Balkan region, and now I'm 100% positive that those certs was a problem, because I had same problem on two machines where I have installed mentioned certs, and I had no issues on the other ones....

So once again, thank you and I want to thank @PaleNeutron also. I assume his method also works, but at the moment I need to keep those certs and cannot delete them.

Kind regards,
Pedja

[r4m0]

I can verify that this problem is caused with certs from Serbian authorities.

@pedjaziv Exactly. I am from Serbia, Belgrade. I also did not want to delete those certs, so at the moment this was the only acceptable solution for me.

[BorisStricky]

@pedjaziv
I manage to solve this problem by removing the:
if certs: self.load_verify_locations(cadata=certs)
from file "C:UsersUSERNAMEAppDataLocalContinuumanaconda3libssl.py", lines 470 and 471

Hi @r4m0 @pedjaziv ,
I wasn't completely comfortable by removing completely the complete verification, so I added line at line 467:
if "MUP Republike Srbije" not in str(cert):
basically I instructed the function to ignore the certificates issued my MUP Rebuplike Srbije.

Now my _load_windows_store_certs function looks like this now (lines 460-473):
file: "C:UsersUSERNAMEAppDataLocalContinuumanaconda3libssl.py"
`

def _load_windows_store_certs(self, storename, purpose):
    certs = bytearray()
    try:
        for cert, encoding, trust in enum_certificates(storename):
            # CA certs are never PKCS#7 encoded
            if encoding == "x509_asn":
                if trust is True or purpose.oid in trust:
                    if "MUP Republike Srbije" not in str(cert): 
                        certs.extend(cert)
    except PermissionError:
        warnings.warn("unable to enumerate Windows certificate store")
    if certs:
        self.load_verify_locations(cadata=certs)
    return certs`

But then again, I am not really an expert in this, and I didn't know much about ssl or CA before this, so I would welcome any feedback on what I did here, and what impact it could have.

Thanks,
Boris

[popmilo]

Thanks Boris !
Your ssl.py mod works. Craziest python error I ran into so far :)

[rupurut]

Hi,
I had the same issue and I solved it by uninstalling "Čitač elektronske lične karte" from Windows 10. :)
I was inspired with your answers and remember what was the last app I installed from MUP and that was it :) Thanks.

[priyaranjan-tokachichu]

I had the same issue. Copying the following dlls (libcrypto-1_1-x64.dll, libssl-1_1-x64.dll) from C:ProgramDataAnaconda3Librarybin to C:ProgramDataAnaconda3DLLs solved my issue. This is on Windows 10 with Anaconda3 64-bit.

[meeseeksmachine]

This issue has been mentioned on Jupyter Community Forum. There might be relevant details there:

https://discourse.jupyter.org/t/jupyter-not-starting/3461/2

[LDjokic]

Hi,
I had the same issue and I solved it by uninstalling "Čitač elektronske lične karte" from Windows 10. :)
I was inspired with your answers and remember what was the last app I installed from MUP and that was it :) Thanks.

Same for me, this resolved my issue, thank you.

[vera942]

@pedjaziv
I manage to solve this problem by removing the:
if certs: self.load_verify_locations(cadata=certs)
from file "C:UsersUSERNAMEAppDataLocalContinuumanaconda3libssl.py", lines 470 and 471

hi! i am facing with the same issue. i cant start the jupyter or anaconda, dunno why. how did u solve it in cmd prompt or? thanks, vera

[vera942]

this is my eror constantly.

(base) C:UsersVera> jupyter notebook
Traceback (most recent call last):
File "C:UsersVeraanaconda3Scriptsjupyter-notebook-script.py", line 6, in
from notebook.notebookapp import main
File "C:UsersVeraanaconda3libsite-packagesnotebooknotebookapp.py", line 64, in
from tornado import httpserver
File "C:UsersVeraanaconda3libsite-packagestornadohttpserver.py", line 32, in
from tornado.http1connection import HTTP1ServerConnection, HTTP1ConnectionParameters
File "C:UsersVeraanaconda3libsite-packagestornadohttp1connection.py", line 33, in
from tornado import httputil
File "C:UsersVeraanaconda3libsite-packagestornadohttputil.py", line 28, in
import http.cookies
File "", line 991, in _find_and_load
File "", line 975, in _find_and_load_unlocked
File "", line 671, in _load_unlocked
File "", line 779, in exec_module
File "", line 915, in get_code
File "", line 973, in get_data
OSError: [Errno 9] Bad file descriptor

[r4m0]

Hi @vera942,

The error seems like a general issue when handling the file for reading or writing. The file is locked for some reason and that may be causing an issue. I might recommend completely uninstalling Anaconda and then reinstalling it somewhere other then C:UsersVeraanaconda3, even maybe on some other drive. If that doesn't solve the issue, there may be some other issue with your system.

[vera942]

i solved it. reinstall the OS. thanks anyway :)

Vera Dimitrievska
https://www.kaggle.com/vdimitrievska/notebooks
https://github.com/vera942?tab=repositories
www.verevere.wordpress.com
T in NL: [phone]
T in MKD: + 389 77 503699
skype name:veravera942

On Sat, 19 Sep 2020 at 23:58, Ramadan Halili [e-mail]
wrote:

Hi @vera942 https://github.com/vera942,

The error seems like a general issue when handling the file for reading or
writing. The file is locked for some reason and that may be causing an
issue. I might recommend completely uninstalling Anaconda and then
reinstalling it somewhere other then C:UsersVeraanaconda3, even maybe on
some other drive. If that doesn't solve the issue, there may be some other
issue with your system.

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[goranad77]

So far, deleting
if cert:
self.load_verify_locations(cadata=certs)
solved my problem.
On the other hand, adding up
if "MUP Republike Srbije" not in str(cert):
did not work for me