Visual Studio Code – VSCode Python debugger runs but nothing happens

I have recently bought a new laptop and set up VSCode and Python so I can continue coding. Everything looks fine, took a bit of messing around to get virtual environments working, but apart from that no problem EXCEPT my code does not run.

To be specific, when I open my code and click "Run | Start Debugging (F5)", for an instant the little toolbar of debug buttons (run, step-over, etc) pops up and disappears, but the code in the window does not run, there is no output to the terminal, nothing happens!

A screenshot of my entire VSCode screen is below.

My launch.json file is below.

    {
    // 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": [

        {
            "type": "chrome",
            "request": "launch",
            "name": "Launch Chrome against localhost",
            "file": "${workspaceFolder}/web/_test/book.html"
        },
    
        {
            "name": "Python: Current File",
            "type": "debugpy",
            "request": "launch",
            "program": "${file}",
            "console": "integratedTerminal"
        },

        {
            "name": "Python: Flask (development mode)",
            "type": "debugpy",
            "request": "launch",
            "module": "flask",
            "env": {
                "FLASK_APP": "flask_run.py",
                "FLASK_ENV": "development"
            },
            "args": [
                "run"
            ],
            "jinja": true
        }
    ]
}

I have all the python extensions installed.