title: oauth-private.key does not exist or is not readable
body: <p>So, I imported another project from Bitbucket and tried to launch it using <code>php artisan serve</code>, I always get this error:</p>
  
  <pre><code>[LogicException]                                                                   
    Key path "file:///var/www/html/DesignViewer5/storage/oauth-private.key" does not   
    exist or is not readable                                                           
  </code></pre>
  
  <p>I don't get this error when I make a project myself, I can't run any other command. I tried 'php artisan key:generate', and got the exact same error.</p>
  
  <p>I tried: <code>composer update</code>, and got this:</p>
  
  <pre><code>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 =&gt; 1.12.0) Downloading: 100%         
  Writing lock file
  Generating autoload files
  &gt; Illuminate\Foundation\ComposerScripts::postUpdate
  &gt; 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
  </code></pre>
  
  <p>Anyone knows how to fix it? Thanks!</p>