Image previews with laravel nova

Hi team.

I have an app that uses a different sub domain for nova and a different sub domain for public.

I am having issues with images loading their previews in nova.

An empty image and the blog saying it is not found

however, when I view the resource, I can see the images.

Here is what I have so far;

filesystem

        'guides' => [
            'driver' => 'local',
            'root' => storage_path('app/public/guides'),
            'url' => env('APP_URL').'/storage/guides',
            'visibility' => 'public',
        ],

resource

    public function fields()
    {
        return [
            Image::make('Image')
                ->disk('guides')
                ->disableDownload()
                ->prunable()
                ->thumbnail(function ($value, $disk) {
                    return $value
                        ? str_replace('www', 'admin', Storage::disk($disk)->url($value))
                        : null;
                })
                ->preview(function ($value, $disk) {
                    return $value
                        ? str_replace('www', 'admin', Storage::disk($disk)->url($value))
                        : null;
                })
                ->required(),
            URL::make('Link'),
        ];
    }

for the life of me I can't workout what is happening

any ideas?