Php 设置Laravel现有项目

我试图通过运行“composer install”命令来安装现有的Laravel项目，但出现以下错误：

 PHP Fatal error:  Uncaught Error: Class 'Symfony\Thanks\Command\ThanksCommand' not found in /home/lyes/Documents/AppStage/vendor/symfony/thanks/src/Thanks.php:58

堆栈跟踪：

 #0 /usr/share/php/Composer/Plugin/PluginManager.php(236): Symfony\Thanks\Thanks->activate(Object(Composer\Composer), Object(Composer\IO\ConsoleIO))
    #1 /usr/share/php/Composer/Plugin/PluginManager.php(205): Composer\Plugin\PluginManager->addPlugin(Object(Symfony\Thanks\Thanks))
    #2 /usr/share/php/Composer/Plugin/PluginManager.php(261): Composer\Plugin\PluginManager->registerPackage(Object(Composer\Package\CompletePackage))
    #3 /usr/share/php/Composer/Plugin/PluginManager.php(76): Composer\Plugin\PluginManager->loadRepository(Object(Composer\Repository\InstalledFilesystemRepository))
    #4 /usr/share/php/Composer/Factory.php(384): Composer\Plugin\PluginManager->loadInstalledPlugins()
    #5 /usr/share/php/Composer/Factory.php(576): Composer\Factory->createComposer(Object(Composer\IO\ConsoleIO), Array, false)
    #6 /usr/share/php/Composer/Console/Application.php(332): C in /home/lyes/Documents/AppStage/vendor/symfony/thanks/src/Thanks.php on line 58

    Fatal error: Uncaught Error: Class 'Symfony\Thanks\Command\ThanksCommand' not found in /home/lyes/Documents/AppStage/vendor/symfony/thanks/src/Thanks.php:58
    Stack trace:
    #0 /usr/share/php/Composer/Plugin/PluginManager.php(236): Symfony\Thanks\Thanks->activate(Object(Composer\Composer), Object(Composer\IO\ConsoleIO))
    #1 /usr/share/php/Composer/Plugin/PluginManager.php(205): Composer\Plugin\PluginManager->addPlugin(Object(Symfony\Thanks\Thanks))
    #2 /usr/share/php/Composer/Plugin/PluginManager.php(261): Composer\Plugin\PluginManager->registerPackage(Object(Composer\Package\CompletePackage))
    #3 /usr/share/php/Composer/Plugin/PluginManager.php(76): Composer\Plugin\PluginManager->loadRepository(Object(Composer\Repository\InstalledFilesystemRepository))
    #4 /usr/share/php/Composer/Factory.php(384): Composer\Plugin\PluginManager->loadInstalledPlugins()
    #5 /usr/share/php/Composer/Factory.php(576): Composer\Factory->createComposer(Object(Composer\IO\ConsoleIO), Array, false)
    #6 /usr/share/php/Composer/Console/Application.php(332): C in /home/lyes/Documents/AppStage/vendor/symfony/thanks/src/Thanks.php on line 58

---

有人能帮我吗，我真的被淹没了

尝试使用composer update和composer dump autoload

命令

只需删除

供应商

文件夹，然后在运行

composer install

时运行

composer update
命令
，它将查找锁文件并安装其中包含的任何内容。检查您的
composer.lock
或运行
composer update
命令
是否尝试以下步骤：


删除
供应商
文件夹（如果已经存在）
删除
composer.lock
文件
在终端中运行
composer安装
命令