我正在运行Laravel 6和PHP 7.2，但出现此错误：
Illuminate \ Contracts \ Container \ BindingResolutionException抛出错误消息“目标类[encrypter]不存在。”
Stacktrace：
#14 Illuminate\Contracts\Container\BindingResolutionException in /Applications/MAMP/htdocs/kiri/kiriarabia/vendor/laravel/framework/src/Illuminate/Container/Container.php:806
#13 ReflectionException in /Applications/MAMP/htdocs/kiri/kiriarabia/vendor/laravel/framework/src/Illuminate/Container/Container.php:804
#12 ReflectionClass:__construct in /Applications/MAMP/htdocs/kiri/kiriarabia/vendor/laravel/framework/src/Illuminate/Container/Container.php:804
#11 Illuminate\Container\Container:build in /Applications/MAMP/htdocs/kiri/kiriarabia/vendor/laravel/framework/src/Illuminate/Container/Container.php:682
#10 Illuminate\Container\Container:resolve in /Applications/MAMP/htdocs/kiri/kiriarabia/vendor/laravel/framework/src/Illuminate/Container/Container.php:630
#9 Illuminate\Container\Container:make in /Applications/MAMP/htdocs/kiri/kiriarabia/vendor/laravel/framework/src/Illuminate/Foundation/Application.php:768
#8 Illuminate\Foundation\Application:make in /Applications/MAMP/htdocs/kiri/kiriarabia/vendor/laravel/framework/src/Illuminate/Container/Container.php:946
#7 Illuminate\Container\Container:resolveClass in /Applications/MAMP/htdocs/kiri/kiriarabia/vendor/laravel/framework/src/Illuminate/Container/Container.php:874
#6 Illuminate\Container\Container:resolveDependencies in /Applications/MAMP/htdocs/kiri/kiriarabia/vendor/laravel/framework/src/Illuminate/Container/Container.php:835
#5 Illuminate\Container\Container:build in /Applications/MAMP/htdocs/kiri/kiriarabia/vendor/laravel/framework/src/Illuminate/Container/Container.php:682
#4 Illuminate\Container\Container:resolve in /Applications/MAMP/htdocs/kiri/kiriarabia/vendor/laravel/framework/src/Illuminate/Container/Container.php:630
#3 Illuminate\Container\Container:make in /Applications/MAMP/htdocs/kiri/kiriarabia/vendor/laravel/framework/src/Illuminate/Foundation/Application.php:768
#2 Illuminate\Foundation\Application:make in /Applications/MAMP/htdocs/kiri/kiriarabia/vendor/laravel/framework/src/Illuminate/Foundation/Http/Kernel.php:215
#1 Illuminate\Foundation\Http\Kernel:terminateMiddleware in /Applications/MAMP/htdocs/kiri/kiriarabia/vendor/laravel/framework/src/Illuminate/Foundation/Http/Kernel.php:189
#0 Illuminate\Foundation\Http\Kernel:terminate in /Applications/MAMP/htdocs/kiri/kiriarabia/public/index.php:60
知道我需要解决什么吗？
答案 0 :(得分：1)
如果您已将类组织到一个子文件夹中，请检查名称空间–它也应包含该子文件夹。
答案 1 :(得分：0)
将旧的加密器中间件复制到新创建的项目中间件文件夹中。
答案 2 :(得分：0)
当中间件不存在时，您可能会遇到此异常。
让我们以以下路线为例：
Route::get('/products/{productId}', 'ProductController@view')
->middleware('some_middleware');
如果未实现中间件some_middleware，则将获得异常目标类[some_middleware]不存在。