Laravel AJAX - 500 Internal Server Error

Attempting to make an AJAX call and getting the 500 Internal Server Error. Cannot figure out what I'm doing wrong.

I tried going through the Laravel documentation, tried countless solutions found on Stack Overflow and here on Laracasts, still no go. Maybe someone here can help a brother out?

I'm using Laravel Framework version 5.1.19

Making a simple AJAX call

$('#save').on('click', function(e){
    e.preventDefault();

    var data = $('form').serialize();
    var url = 'http://localhost:8000/dashboard/posts';

    $.ajax({
        type: 'post',
        url: url,
        data: data,
        dataType: 'json',
        success: function(data) {
            console.log('success: '+data);
        },
        error: function(data) {
            var errors = data.responseJSON;
            console.log(errors);
        }
    });
});

Getting this response back

 [HTTP/1.0 500 Internal Server Error]

Got my route setup like so

Route::resource('dashboard/posts', 'PostsController');

Here's the route:list

| Method   | URI                                | Name                                      | Action                                                                                    | Middleware |
| POST        | dashboard/posts    | dashboard.posts.store   | App\Http\Controllers\PostsController@store      | auth               |

Here's the controller method

public function store(PostRequest $request)
{
    $response = array(
        'status' => 'success',
        'msg'    => 'Setting created successfully',
    );

    return Response::json($response);
}

I got the token in the head of my view

<meta name="csrf_token" content="{{ csrf_token() }}" />

I have the headers being set properly before the AJAX call

$.ajaxSetup({
    headers: {
        'X-CSRF-TOKEN': $('meta[name="csrf_token"]').attr('content')
    }
});

Tried adding the token field to the form too

{{ csrf_field() }}

And even passing it through in the data

data: {
    '_token': $('input[name="_token"]').val(),
    'data': data,
}

Running out of ideas at this point on what the problem is.