Cannot Generate : [ErrorException] Undefined index: name

[tri-evendi]

in this code on vendors/InfyOmLabs/generator-builder/controllers/GeneratorBuilderController.php ;
private function validateFields($fields)
{
$fieldsGroupBy = collect($fields)->groupBy(function ($item) {
return strtolower($item['name']);
});

    $duplicateFields = $fieldsGroupBy->filter(function (Collection $groups) {
        return $groups->count() > 1;
    });
    if (count($duplicateFields)) {
        throw new \Exception('Duplicate fields are not allowed');
    }

    return true;
}

return error responseText: "{↵ "message": "Undefined index: name".
How to fix this?