laravel-admin 报错 Disk [admin] not configured

在添加资料的时候报：

Disk [admin] not configured, please add a disk config in `config/filesystems.php`.

在config/filesystems.php中添加：

'disks' => [

        'local' => [
            'driver' => 'local',
            'root' => storage_path('app'),
        ],

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

        's3' => [
            'driver' => 's3',
            'key' => env('AWS_ACCESS_KEY_ID'),
            'secret' => env('AWS_SECRET_ACCESS_KEY'),
            'region' => env('AWS_DEFAULT_REGION'),
            'bucket' => env('AWS_BUCKET'),
            'url' => env('AWS_URL'),
        ],
         // 添加的代码
        'admin' => [
            'driver'     => 'local',
            'root'       => public_path('upload'),
            'visibility' => 'public',
            'url' => env('APP_URL').'/public/upload/',
        ],

    ]