Target [Illuminate\Contracts\Auth\Access\Gate] is not instantiable.

今天重新部署laravel遇到了这个问题，首先要先确认config\app.php中存在如下两行

'providers' => [
    Illuminate\Auth\AuthServiceProvider::class,
]

'aliases' => [
    'Gate' => Illuminate\Support\Facades\Gate::class,
]

之后删除缓存文件（注意不要删除cache目录本身）

rm -rf bootstrap/cache/*