The file "login_img.jpg" was not uploaded due to an unknown error.

here is my form in blade

<form action="{{ route('add.new.album') }}" method="post" enctype="multipart/form-data">
                    @csrf
                    <div class="form-body">
                        <h5 class="form-section">
                            <i class="ft-user"></i> Album information
                        </h5>
                        <div class="row">
                            <div class="col-sm-6">
                                <div class="form-group">
                                    <label for="album_name">Album name</label>
                                    <input class="form-control" id="album_name" type="text" placeholder="Album name" name="album_name">
                                </div>
                            </div>
                            <div class="col-sm-6">
                                <label for="main_image">Main image</label>
                                <input class="form-control" id="main_image" type="file" name="main_image">
                            </div>
                        </div>

                        <h5 class="form-section mt-3"><i class="ft-user"></i> Add at last one image</h5>
                        <div class="row input-form">
                            <div class="col-sm-5">
                                <label for="images">Image</label>
                                <input class="form-control" id="images" type="file" name="images[]">
                            </div>
                            <div class="col-sm-5">
                                <div class="form-group">
                                    <label for="image_names">Name</label>
                                    <input class="form-control" id="image_names" type="text" placeholder="Image name" name="image_names[]">
                                </div>
                            </div>
                            <div class="col-sm-2 mt-4">
                                <input class="btn btn-primary" id="add_more" type="button" value="Add more +">
                            </div>
                        </div>
                        <div class="row">
                            <div class="col-sm-12 mt-5">
                                <input class="btn btn-success" type="submit" value="Save Album">
                            </div>
                        </div>
                    </div>
                </form>

and here is my controller

public function store(Request $request) {
		$input = $request->all();
		if ($request->file('main_image')) {
			$file     = $request->file('main_image');
			$filename = date('YmdHi').$file->getClientOriginalName();
			$file->move(public_path()."/album-images/", $filename);
			$input['main_image'] = $filename;
		}
		$album = Album::create([
			'album_name' => $input['album_name'],
			'main_image' => $input['main_image'],
		]);
		$fileNames = [];
		if ($request->hasFile('images')) {
			foreach ($request->file('images') as $image) {
				foreach ($request->image_names as $name) {
					$imageName=$image->getClientOriginalName();
					$image->move(public_path().'/album-images/', $imageName);
					$fileNames[] = $imageName;
				}
			}
			$images = json_encode($fileNames);
			(new AlbumPhoto())->create([
				'album_id'    => $album->id,
				'images'      => $images,
				'image_names' => $name,
			]);
		}
		return redirect()->route('album');
	}

I keep get The file "x.jpg" was not uploaded due to an unknown error.