AttributeError: 'NoneType' object has no attribute 'SSLContext'

[kr-prince]

• VSCode Version: 1.38

• OS Version: Win 10 64 Bit Enterprise SoEv1.3 - Version (1703)

• Conda Info -

  active environment : mainEnv
  active env location : D:\Continuum\anaconda3\envs\mainEnv
  shell level : 2
  user config file : C:\Users\1120978.condarc
  populated config files : C:\Users\1120978.condarc
  conda version : 4.5.4
  conda-build version : 3.10.5
  python version : 3.6.5.final.0
  base environment : D:\Continuum\anaconda3 (writable)
  channel URLs : https://repo.anaconda.com/pkgs/main/win-64
  https://repo.anaconda.com/pkgs/main/noarch
  https://repo.anaconda.com/pkgs/free/win-64
  https://repo.anaconda.com/pkgs/free/noarch
  https://repo.anaconda.com/pkgs/r/win-64
  https://repo.anaconda.com/pkgs/r/noarch
  https://repo.anaconda.com/pkgs/pro/win-64
  https://repo.anaconda.com/pkgs/pro/noarch
  https://repo.anaconda.com/pkgs/msys2/win-64
  https://repo.anaconda.com/pkgs/msys2/noarch
  https://conda.anaconda.org/conda-forge/win-64
  https://conda.anaconda.org/conda-forge/noarch
  package cache : D:\Continuum\anaconda3\pkgs
  C:\Users\1120978\AppData\Local\conda\conda\pkgs
  envs directories : D:\Continuum\anaconda3\envs
  C:\Users\1120978\AppData\Local\conda\conda\envs
  C:\Users\1120978.conda\envs
  platform : win-64
  user-agent : conda/4.5.4 requests/2.18.4 CPython/3.6.5 Windows/10 Windows/10.0.15063
  administrator : True
  netrc file : None
  offline mode : False

Steps to Reproduce:

1. Launch VS Code and copy the below simple Flask App Code

#!flask/bin/python
from flask import Flask

app = Flask(__name__)

@app.route('/')
def index():
    return "Hello, World!"

if __name__ == '__main__':
    app.run(debug=True)

2. Start debugging using Flask
3. Expectation is that the code will run and start the Flask app on the default port, but actually the terminal freezes, and after sometimes the below error comes up :

PS D:\Projects\PyNLP-Rest_Src\src> & 'D:\Continuum\anaconda3\envs\mainEnv\python.exe' 'c:\Users\1120978.vscode\extensions\ms-python.python-2018.12.0\pythonFiles\ptvsd_launcher.py' '--default' '--client'
'--host' 'localhost' '--port' '50449' '-m' 'flask' 'run'
Traceback (most recent call last):
File "c:\Users\1120978.vscode\extensions\ms-python.python-2018.12.0\pythonFiles\ptvsd_launcher.py", line 45, in
main(ptvsdArgs)
File "c:\Users\1120978.vscode\extensions\ms-python.python-2018.12.0\pythonFiles\lib\python\ptvsd_main_.py", line 265, in main
wait=args.wait)
File "c:\Users\1120978.vscode\extensions\ms-python.python-2018.12.0\pythonFiles\lib\python\ptvsd_main_.py", line 258, in handle_args
debug_main(addr, name, kind, *extra, **kwargs)
File "c:\Users\1120978.vscode\extensions\ms-python.python-2018.12.0\pythonFiles\lib\python\ptvsd_local.py", line 43, in debug_main
run_module(address, name, *extra, **kwargs)
File "c:\Users\1120978.vscode\extensions\ms-python.python-2018.12.0\pythonFiles\lib\python\ptvsd_local.py", line 68, in run_module
run(argv, addr, **kwargs)
File "c:\Users\1120978.vscode\extensions\ms-python.python-2018.12.0\pythonFiles\lib\python\ptvsd_local.py", line 140, in _run
_pydevd.main()
File "c:\Users\1120978.vscode\extensions\ms-python.python-2018.12.0\pythonFiles\lib\python\ptvsd_vendored\pydevd\pydevd.py", line 1925, in main
debugger.connect(host, port)
File "c:\Users\1120978.vscode\extensions\ms-python.python-2018.12.0\pythonFiles\lib\python\ptvsd_vendored\pydevd\pydevd.py", line 1283, in run
return self._exec(is_module, entry_point_fn, module_name, file, globals, locals)
File "c:\Users\1120978.vscode\extensions\ms-python.python-2018.12.0\pythonFiles\lib\python\ptvsd_vendored\pydevd\pydevd.py", line 1307, in _exec
runpy._run_module_as_main(module_name, alter_argv=False)
File "D:\Continuum\anaconda3\envs\mainEnv\lib\runpy.py", line 193, in _run_module_as_main
"main", mod_spec)
File "D:\Continuum\anaconda3\envs\mainEnv\lib\runpy.py", line 85, in run_code
exec(code, run_globals)
File "D:\Continuum\anaconda3\envs\mainEnv\lib\site-packages\flask_main.py", line 15, in main(as_module=True)
File "D:\Continuum\anaconda3\envs\mainEnv\lib\site-packages\flask\cli.py", line 966, in main
cli.main(prog_name="python -m flask" if as_module else None)
File "D:\Continuum\anaconda3\envs\mainEnv\lib\site-packages\flask\cli.py", line 586, in main
return super(FlaskGroup, self).main(*args, **kwargs)
File "D:\Continuum\anaconda3\envs\mainEnv\lib\site-packages\click\core.py", line 717, in main
rv = self.invoke(ctx)
File "D:\Continuum\anaconda3\envs\mainEnv\lib\site-packages\click\core.py", line 1135, in invoke
sub_ctx = cmd.make_context(cmd_name, args, parent=ctx)
File "D:\Continuum\anaconda3\envs\mainEnv\lib\site-packages\click\core.py", line 641, in make_context
self.parse_args(ctx, args)
File "D:\Continuum\anaconda3\envs\mainEnv\lib\site-packages\click\core.py", line 940, in parse_args
value, args = param.handle_parse_result(ctx, opts, args)
File "D:\Continuum\anaconda3\envs\mainEnv\lib\site-packages\click\core.py", line 1477, in handle_parse_result
self.callback, ctx, self, value)
File "D:\Continuum\anaconda3\envs\mainEnv\lib\site-packages\click\core.py", line 96, in invoke_param_callback
return callback(ctx, param, value)
File "D:\Continuum\anaconda3\envs\mainEnv\lib\site-packages\flask\cli.py", line 742, in _validate_key
is_context = isinstance(cert, ssl.SSLContext)
AttributeError: 'NoneType' object has no attribute 'SSLContext'

Some the links I tried to solve the issue have been mentioned below. I tried to revert python extension and VS Code to older versions (9-10 months back), changing settings.json file. But nothing helped.
#3272
debugging-a-script-in-vs-code-is-causing-an-attributeerror
#1581

[chrmarti]

/causedByExtension

This is caused by the Python extension. Please file a new issue for it: https://github.com/microsoft/vscode-python/issues/new/choose

[vscodebot]

This issue is caused by an extension, please file it with the repository (or contact) the extension has linked in its overview in VS Code or the marketplace for VS Code. See also our issue reporting guidelines.

Happy Coding!

[kr-prince]

/causedByExtension

This is caused by the Python extension. Please file a new issue for it: https://github.com/microsoft/vscode-python/issues/new/choose

@chrmarti could you place let me know where I have to raise this issue? (Or how do I find the correct platform?) The link which you have mentioned is the same one I used before. Did I choose any wrong option there?

[chrmarti]

@kr-prince Have you filed this with the Python extension before? (This here is VS Code's main issue tracking.)

Looking at the error again, it looks like this might be an issue with your Anaconda installation or the mainEnv environment. Maybe StackOverflow can help you with that.