oauth-private.key不存在或不可读

因此，我从Bitbucket导入了另一个项目，并尝试使用启动它，我总是得到这个错误：php artisan serve

[LogicException]                                                                   
  Key path "file:///var/www/html/DesignViewer5/storage/oauth-private.key" does not   
  exist or is not readable                                                           

当我自己做一个项目时，我不会得到这个错误，我无法运行任何其他命令。我尝试了“php artisan key：generate”，并得到了完全相同的错误。

我试过了： ，并得到了这个：composer update

Loading composer repositories with package information
Updating dependencies (including require-dev)
Package operations: 0 installs, 1 update, 0 removals
  - Updating spatie/laravel-permission (1.11.1 => 1.12.0) Downloading: 100%         
Writing lock file
Generating autoload files
> Illuminate\Foundation\ComposerScripts::postUpdate
> php artisan optimize


  [LogicException]                                                             
  Key path "file:///var/www/html/DesignViewer5/storage/oauth-private.key" doe  
  s not exist or is not readable                                               


Script php artisan optimize handling the post-update-cmd event returned with error code 1

有人知道如何解决它吗？谢谢！