Why doesn't a laravel site work on shared hosting?

Question

Laravel

Hello. I am developing a simple website on laravel 5.4. Everything works locally. I decided to upload to free (just to let my friends test) hosting. I updated PHP to version 7 on the hosting. I uploaded the files of the framework itself (everything except the public folder) to a folder above the public_html level (./public_html/../), uploaded the contents of the public folder (the one in the framework) to public_html on the hosting. In index.php I registered the paths to autoload.php:

require __DIR__.'/../bootstrap/autoload.php';
$app = require_once __DIR__.'/../bootstrap/app.php';

When I try to access the site, I get the following error:

Warning: include(/home/u820974330/vendor/composer/../symfony/http-foundation/ParameterBag.php): failed to open stream: No such file or directory in /home/u820974330/vendor/composer/ClassLoader.php on line 440
Warning: include(): Failed opening '/home/u820974330/vendor/composer/../symfony/http-foundation/ParameterBag.php' for inclusion (include_path='.:/opt/php-7.0/pear ') in /home/u820974330/vendor/composer/ClassLoader.php on line 440
Fatal error: Uncaught Error: Class 'Symfony\Component\HttpFoundation\ParameterBag' not found in /home/u820974330/vendor/symfony/http-foundation/Request.php:276 Stack trace: #0 /home/u820974330/vendor/symfony /http-foundation/Request.php(258): Symfony\Component\HttpFoundation\Request->initialize(Array, Array, Array, Array, Array, Array, NULL) #1 /home/u820974330/vendor/symfony/http- foundation/Request.php(2012): Symfony\Component\HttpFoundation\Request->__construct(Array, Array, Array, Array, Array, Array, NULL) #2 /home/u820974330/vendor/symfony/http-foundation/Request .php(317): Symfony\Component\HttpFoundation\Request::createRequestFromFactory(Array, Array, Array, Array, Array, Array) #3 /home/u820974330/vendor/laravel/framework/src/Illuminate/Http/Request. php(59): Symfony\Component\HttpFoundation\Request::createFromGlobals() #4 /home/u820974330/public_html/index.php(53): Illuminate\Http\Request::capture() #5 {main} thrown in /home/u820974330/vendor/symfony/http-foundation/Request .php on line 276

Can anyone come across this? I will be glad for any help. If you need some values ​​from phpinfo(), write, I'll throw it off.
Thanks in advance.

Answer 1

Everything is written in the error there, do a composer update, if it doesn’t help, then see what you set up the curve, and name the host or check the files

Answer 2

Made a local composer update and re-uploaded the vendor folder to the hosting. Thanks to all