I got this error from a JSON Validator - what does this mean?

Question

Parse error on line 1: }, { ^ Expecting 'STRING', 'NUMBER', 'NULL', 'TRUE', 'FALSE', '{', '[', got '}'

I have never edited JSON or strings in my life and I have no idea how to troubleshoot the code for my job.

The first few lines of my code looks like this:

},
        {
            "include": false,
            "new_window": true,
            "pages": [