forEach is Not a Function Error in JQuery from JSON array

Many things can be serialized in Javascript, including strings. For example, if you stringify:

const foo = 'foo';
JSON.stringify(foo);

you get

"foo"

Here, because you're stringifying a string the same way:

response =JSON.stringify('[{"file": "app.dll", "fields": {"name": "Misc App", "rank": 1}}]');

When you parse it later, you get back the original string, as intended.

Either don't stringify it at all initially:

let response = '[{"file": "app.dll", "fields": {"name": "Misc App", "rank": 1}}]';
response = JSON.parse(response);
console.log(response);

response.forEach(function(element){
    console.log(element);
});

Or, if you really have to, parse it twice:

let response = JSON.stringify('[{"file": "app.dll", "fields": {"name": "Misc App", "rank": 1}}]');
response = JSON.parse(JSON.parse(response));
console.log(response);

response.forEach(function(element){
    console.log(element);
});

(but that's a very weird solution - it'd be better by far not to stringify the string in the first place, since it's already in parseable JSON format)