在000WebHost部署Laravel遇helpers.php加载失败错误求助

Fatal error: Uncaught Error: Failed opening required '/storage/ssd5/191/19896191/laravel/vendor/composer/../laravel/framework/src/Illuminate/Collections/helpers.php' (include_path='.:/usr/share/pear:/usr/share/php:/usr/share/pear:/usr/share/php') in /storage/ssd5/191/19896191/laravel/vendor/composer/autoload_real.php:39 Stack trace: #0 /storage/ssd5/191/19896191/laravel/vendor/composer/autoload_real.php(43): {closure}() #1 /storage/ssd5/191/19896191/laravel/vendor/autoload.php(25): ComposerAutoloaderInit77107db52e33f59325c65f41516f3a02::getLoader() #2 /storage/ssd5/191/19896191/public_html/index.php(36): require('...') #3 {main} thrown in /storage/ssd5/191/19896191/laravel/vendor/composer/autoload_real.php on line 39

为了显示错误，已在index.php开头添加以下代码：

ini_set('display_errors', '1');
ini_set('display_startup_errors', '1');
error_reporting(E_ALL);

部署步骤如下：

• 压缩除public文件夹外的所有文件，同时单独压缩public文件夹；
• 使用unzipper将压缩包解压到主机目录，得到对应文件结构；
• 修改index.php文件，在两行代码中添加laravel/路径：

  require __DIR__.'/../laravel/vendor/autoload.php';
  
  /*
  |--------------------------------------------------------------------------
  | Run The Application
  |--------------------------------------------------------------------------
  |
  | Once we have the application, we can handle the incoming request using
  | the application's HTTP kernel. Then, we will send the response back
  | to this client's browser, allowing them to enjoy our application.
  |
  */
  
  $app = require_once __DIR__.'/../laravel/bootstrap/app.php';
  

• 修改app/providers/AppServiceProvider.php文件：

  public function register()
  {
    $this->app->bind('path.public',function(){
    return'/public_html';
    });
  }
  

• 清除缓存：删除bootstrap/cache中除.gitignore外的所有文件，同时在本地压缩前尝试过执行composer install、composer dump-autoload、composer update、composer update --no-scripts命令；
• 正确配置.env文件（数据库等信息）。

仅手动修改过composer.json，添加了以下配置项：

"config": {
        "optimize-autoloader": true,
        "platform-check": false, //This line!
        "preferred-install": "dist",
        "sort-packages": true
    },

此外还尝试修改.htaccess为以下内容：

<IfModule mod_rewrite.c>
RewriteEngine On
RewriteRule ^(.*)$ public/$1 [L]
</IfModule>

已调整过文件夹结构，但问题仍未解决。

内容的提问来源于stack exchange，提问作者Lucas Tomic