akhambulator

OK – I solved the problem, and it’s completely insane. I live in Serbia and have installed our official smart card ID reader. All of the certs issued by our police are broken, and I found this by searching for the SSL problem from the log. Some people had issues with other python things like anaconda, somebody had problems with autodesk software.

So, if somebody else has this issue: start windows MMC.exe, find all of the certificates issued by the Serbian MUP and delete them.

Here is a solution in Serbian, with a potential workaround: https://algora.petlja.org/t/python-instalacija-windows/999/9

Here is a thread from autodesk with the same problem: https://forums.autodesk.com/t5/fusion-360-support/nested-asn1-error-ssl-c-3947/td-p/9069024

One reboot after deleting the certs and everything runs perfectly.

Sure thing, this is what I get:

CAD Transform 0.0.9 : ready
Exception in thread Thread-1:
Traceback (most recent call last):
  File "C:\Program Files\Blender Foundation\Blender 2.90\2.90\python\lib\threading.py", line 926, in _bootstrap_inner
    self.run()
  File "C:\Program Files\Blender Foundation\Blender 2.90\2.90\python\lib\threading.py", line 870, in run
    self._target(*self._args, **self._kwargs)
  File "G:\verge3d_blender\python\pluginUtils\manager.py", line 38, in runServerProc
    import server
  File "G:\verge3d_blender\python\pluginUtils\..\..\manager\server.py", line 16, in <module>
    import tornado.web
  File "G:\verge3d_blender\manager\lib\tornado\web.py", line 87, in <module>
    from tornado import iostream
  File "G:\verge3d_blender\manager\lib\tornado\iostream.py", line 40, in <module>
    from tornado.netutil import ssl_wrap_socket, ssl_match_hostname, SSLCertificateError, _client_ssl_defaults, _server_ssl_defaults
  File "G:\verge3d_blender\manager\lib\tornado\netutil.py", line 66, in <module>
    ssl.Purpose.SERVER_AUTH)
  File "C:\Program Files\Blender Foundation\Blender 2.90\2.90\python\lib\ssl.py", line 589, in create_default_context
    context.load_default_certs(purpose)
  File "C:\Program Files\Blender Foundation\Blender 2.90\2.90\python\lib\ssl.py", line 490, in load_default_certs
    self._load_windows_store_certs(storename, purpose)
  File "C:\Program Files\Blender Foundation\Blender 2.90\2.90\python\lib\ssl.py", line 482, in _load_windows_store_certs
    self.load_verify_locations(cadata=certs)
ssl.SSLError: nested asn1 error (_ssl.c:4003)

V3D-INFO: Starting glTF 2.0 export
V3D-INFO: Extracting Cube primitives
V3D-INFO: Finished glTF 2.0 export
Exception in thread Thread-2:
Traceback (most recent call last):
  File "C:\Program Files\Blender Foundation\Blender 2.90\2.90\python\lib\threading.py", line 926, in _bootstrap_inner
    self.run()
  File "C:\Program Files\Blender Foundation\Blender 2.90\2.90\python\lib\threading.py", line 870, in run
    self._target(*self._args, **self._kwargs)
  File "G:\verge3d_blender\python\pluginUtils\manager.py", line 38, in runServerProc
    import server
  File "G:\verge3d_blender\python\pluginUtils\..\..\manager\server.py", line 16, in <module>
    import tornado.web
  File "G:\verge3d_blender\manager\lib\tornado\web.py", line 87, in <module>
    from tornado import iostream
  File "G:\verge3d_blender\manager\lib\tornado\iostream.py", line 40, in <module>
    from tornado.netutil import ssl_wrap_socket, ssl_match_hostname, SSLCertificateError, _client_ssl_defaults, _server_ssl_defaults
  File "G:\verge3d_blender\manager\lib\tornado\netutil.py", line 66, in <module>
    ssl.Purpose.SERVER_AUTH)
  File "C:\Program Files\Blender Foundation\Blender 2.90\2.90\python\lib\ssl.py", line 589, in create_default_context
    context.load_default_certs(purpose)
  File "C:\Program Files\Blender Foundation\Blender 2.90\2.90\python\lib\ssl.py", line 490, in load_default_certs
    self._load_windows_store_certs(storename, purpose)
  File "C:\Program Files\Blender Foundation\Blender 2.90\2.90\python\lib\ssl.py", line 482, in _load_windows_store_certs
    self.load_verify_locations(cadata=certs)
ssl.SSLError: nested asn1 error (_ssl.c:4003)