Anaconda Jypiter wont start, Spyder reporting errors

Question

I did try uninstalling and installing Anaconda, but the problem remains the same. Windows 10 x64, latest Anaconda Installation goes fine, but when I start Spyder it reports this: "You have missing dependencies, nbconvert >=4.0": None. However, nbconvert is already installed. It prompted me to install Kite, when I did it says Kite installation error. When I try to launch jupyter lab I get this:

Traceback (most recent call last): File "C:\Users\Aleksandar\anaconda3\Scripts\jupyter-lab-script.py", line 5, in from jupyterlab.labapp import main File "C:\Users\Aleksandar\anaconda3\lib\site-packages\jupyterlab\labapp.py", line 14, in from jupyterlab_server import slugify, WORKSPACE_EXTENSION File "C:\Users\Aleksandar\anaconda3\lib\site-packages\jupyterlab_server__init__.py", line 4, in from .app import LabServerApp File "C:\Users\Aleksandar\anaconda3\lib\site-packages\jupyterlab_server\app.py", line 9, in from .server import ServerApp File "C:\Users\Aleksandar\anaconda3\lib\site-packages\jupyterlab_server\server.py", line 14, in from notebook.base.handlers import ( File "C:\Users\Aleksandar\anaconda3\lib\site-packages\notebook\base\handlers.py", line 22, in from tornado import web, gen, escape, httputil File "C:\Users\Aleksandar\anaconda3\lib\site-packages\tornado\web.py", line 87, in from tornado.httpserver import HTTPServer File "C:\Users\Aleksandar\anaconda3\lib\site-packages\tornado\httpserver.py", line 32, in from tornado.http1connection import HTTP1ServerConnection, HTTP1ConnectionParameters File "C:\Users\Aleksandar\anaconda3\lib\site-packages\tornado\http1connection.py", line 34, in from tornado import iostream File "C:\Users\Aleksandar\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\Aleksandar\anaconda3\lib\site-packages\tornado\netutil.py", line 39, in _client_ssl_defaults = ssl.create_default_context(ssl.Purpose.SERVER_AUTH) File "C:\Users\Aleksandar\anaconda3\lib\ssl.py", line 589, in create_default_context context.load_default_certs(purpose) File "C:\Users\Aleksandar\anaconda3\lib\ssl.py", line 490, in load_default_certs self._load_windows_store_certs(storename, purpose) File "C:\Users\Aleksandar\anaconda3\lib\ssl.py", line 482, in _load_windows_store_certs self.load_verify_locations(cadata=certs) ssl.SSLError: nested asn1 error (_ssl.c:4003)

Aleksandar Ciric Aleksandar Ciric · Accepted Answer · 2020-06-08T10:47:05

Found an error. It is caused by the certificates issued by Serbian government. The solution is changing ssl.py like this:

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`

Anaconda Jypiter wont start, Spyder reporting errors

1 Answers