laravel-admin报错： Driver [] is not supported.

1. Look at the config admin.php 

1) The modified disk admin, and is not required to change admin, or the need to add not the case.
 'Upload' => [ 
    // Disk in `config / filesystem.php`. 
    'Disk' => 'ADMIN',

     File and Image Upload path // the Disk an under above. 
    'Directory' => [ 
        'Image' => 'Images', 
        'File' => 'Files', 
    ], 
] 

2) editing the config of filesystems.php: 
in disks under increased:

'ADMIN' => [ 
    'Driver' => 'local', 
    'the root' => public_path ( 'Upload'), // local image upload path 
    'visibility' => 'public',                   
    'URL' => the env ( 'APP_URL'). '/ public / upload /', // access path provided 
]