running cobol in visual studio code problem with json file

I'm trying to compile cobol code in vs studio code, but got problem with the json file, see:
https://dickens.co.in/run-cobol-vscode-msys2-windows

below is the json file:

The problem is the row with - "cobcargs": ,
how to fix this?

{
    "version": "0.2.0",
    "configurations": 
    [
        {
            "name": "COBOL debugger",
            "type": "gdb",
            "request": "launch",
            "cobcargs": ,
            "group": ["${file}"]
        }
    ]
}

The issue with your JSON file is that the "cobcargs" value is empty

The "cobcargs" field is used to pass arguments to the compiler. You should specify the necessary compiler arguments

here's an example with arguments

{
  "version": "0.2.0",
  "configurations": [
    {
      "name": "COBOL debugger",
      "type": "gdb",
      "request": "launch",
      "cobcargs": ["-free"],  // Specify the compiler arguments here
      "group": ["${file}"]
    }
  ]
}