Getting the error above as a pop up after trying to debug a python file. Using the latest python extension. Reverted to a version a month old, 2019.11.50794 (22 November 2019), and the problem is gone.

Here it is: sb) C:\Users\userX\py\test>cmd /C "set "PTVSD_SESSION_ID=1" && set "PTVSD_LAUNCHER_PORT=51886" && c:\Users\userX\py\sb\Scripts\python.exe c:\Users\userX.vscode\extensions\ms-python.python-2019.10.44104\pythonFiles\lib\python\ptvsd-cp37-cp37m-win_amd64\ptvsd\launcher c:\Users\userX\py\test\train.py "

launch.json:

{ // Use IntelliSense to learn about possible attributes. // Hover to view descriptions of existing attributes. // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387 "version": "0.2.0", "configurations": [

    {
        "name": "Python: Current File (Integrated Terminal)",
        "type": "python",
        "request": "launch",
        "program": "${file}",
        "console": "integratedTerminal"
    },
    {
        "name": "Python: Remote Attach",
        "type": "python",
        "request": "attach",
        "port": 5678,
        "host": "localhost",
        "pathMappings": [
            {
                "localRoot": "${workspaceFolder}",
                "remoteRoot": "."
            }
        ]
    },
    {
        "name": "Python: Module",
        "type": "python",
        "request": "launch",
        "module": "enter-your-module-name-here",
        "console": "integratedTerminal"
    },
    {
        "name": "Python: Django",
        "type": "python",
        "request": "launch",
        "program": "${workspaceFolder}/manage.py",
        "console": "integratedTerminal",
        "args": [
            "runserver",
            "--noreload",
            "--nothreading"
        ],
        "django": true
    },
    {
        "name": "Python: Flask",
        "type": "python",
        "request": "launch",
        "module": "flask",
        "env": {
            "FLASK_APP": "app.py"
        },
        "args": [
            "run",
            "--no-debugger",
            "--no-reload"
        ],
        "jinja": true
    },
    {
        "name": "Python: Current File (External Terminal)",
        "type": "python",
        "request": "launch",
        "program": "${file}",
        "console": "externalTerminal"
    }
]

}