Debug Vue.js App with VS Code. Error Unverified Breakpoint

I have the following problem. I want to debug my Vue.js project with VS Code and Chrome. So I follow the official guide on the website Guide but it dont work. The Problem is that I always get the error :

 unverified breakpoint

What do I wrong?

This is my vue.config.js

    module.exports = {
    configureWebpack: {
      devtool: 'source-map'
    }
  }

This is my debugging stetting:

    {
    // 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": "vuejs: chrome",
            "url": "http://localhost:8080",
            "webRoot": "${workspaceFolder}/src",
            "breakOnLoad": true,
            "sourceMapPathOverrides": {
                "webpack:///src/*": "${webRoot}/*"
            }
        }
    ]
}

And this is my package.json

    "name": "test-app",
  "version": "0.1.0",
  "private": true,
  "scripts": {
    "serve": "vue-cli-service serve",
    "build": "vue-cli-service build",
    "lint": "vue-cli-service lint"
  },

When I try npm run serve I get the error message unverified breakpoint and my breakpoint is never be hit.

I use the vue-cli 3 to generate the project.

Can someone help me pls?

Update

Maybe something is wrong with the path. Because when i run .scripts in the debugger console in VS Code I get paths like this

(c:\Users\XY\Desktop\Vue\test-app\webpack:\src\main.ts)

But there is no folder webpack:. But I have no idea why he is thinking that there is a folder. He make this in every file.

And in my tsconfig.js I already have "sourceMap": true.

Update 2

When I check the checkbox All Exceptions, VS Code show me all Exceptions in my App (they are catched). But my Breakpoints still dont work.

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