Ajax script to update record does not work, Laravel - ajax

Question

I wrote a small script that updates the information on the page when editing. Everything basically works as it should, but I just can’t update the image. I don’t understand what the matter is. Without a script, with a page reload, everything works as it should.
Ajax script
<script type="text/javascript">
$("document").ready(function() {
$("#editPostButton{{$post->id}}").click(function() {
var formData = $("#EditPostForm{{$post->id}}").serialize();
$.ajax({
url: "{{route('editPost', ['id' => $user->id, 'postId' => $post->id])}}",
type: "POST",
data: formData,
success: function(data) {
$("#textpostdata{{$post->id}}").html($(data).find("#textpostdata{{$post->id}}").html());
$("#closeButton{{$post->id}}").click();
}
});
});
});
</script>
My Controller
public function editPost(Request $request, $id, $postId) {
$validator = $this->validate($request,[
'title' => 'max:100',
'message' => 'max:5000',
'img' => 'mimes:jpeg,png,gif,jpg|max:5000',
'videoPost' => 'max:100'
]);
if($validator) {
$user = User::find($id);
if(!$user && $user != Auth::user()->id) {
return abort(404);
}
$post = Profile::find($postId);
if(!$post) {
return abort(404);
}
$post->user_id = Auth::user()->id;
$post->title = $request->title;
$post->message = $request->message;
$post->videoPost = str_replace('watch?v=', 'embed/', $request->videoPost);
if($request->file('img')) {
$path = Storage::putFile('public/'.Auth::user()->id.'/post', $request->file('img'));
$url = Storage::url($path);
$post->img = $url;
}
$post->update();
return redirect()->back();
}
}
And update form
<form action="{{route('editPost', ['id' => $user->id, 'postId' => $post->id])}}" method="post" enctype="multipart/form-data" id="EditPostForm{{$post->id}}" name="postForm">
#csrf #method('PATCH')
<div class="form-group">
<textarea maxlength="100" name="title" class="form-control" rows="1">{{$post->title}}</textarea>
</div>
<div class="form-group">
<textarea id="message" maxlength="5000" name="message" class="form-control" rows="10">{{$post->message}}</textarea>
</div>
<div class="form-group">
<textarea maxlength="100" class="form-control mt-1" id="videoPost" name="videoPost" cols="100" rows="1">{{$post->videoPost}}</textarea>
</div>
<h6>Current image</h6>
<img src="{{$post->img}}" class="img-fluid mb-2" width="230">
<div class="form-group">
<input type="file" id="img" name="img" accept="image/*">
</div>
<button type="button" class="btn btn-sm btn-primary" id="editPostButton{{$post->id}}">Edit</button>
</form>