Php Laravel 6错误：目标类[encrypter]不存在

我运行的是Laravel 6和PHP 7.2，出现以下错误：

Illumb\Contracts\Container\BindingResolutionException抛出消息“目标类[encrypter]不存在”

堆栈跟踪：

#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

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知道我需要修复什么吗？

如果您已将类组织到子文件夹中，请检查名称空间–它也应该包括子文件夹。

将旧的加密器中间件复制到新创建的项目中间件文件夹。

如果中间件不存在，您可能会遇到此异常

让我们考虑下面的路线，例如：

Route:：get（'/products/{productId}'，'ProductController@view')
->中间件（some_中间件）；

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如果中间件

some\u middleware

未实现，则您将获得异常目标类[some\u middleware]不存在。

您是否运行了

php artisan key:generate

？是，im获取：App\Providers\EventServiceProvider:：boot的声明（light\Contracts\Events\Dispatcher$Events）应与Lightlight\Foundation\Support\Providers\EventServiceProvider:：boot（）兼容。是否安装新的Laravel或升级？我安装了一个新版本，正在从现有项目迁移目录复制EventServiceProvider文件代码回答您的问题