Where are the error logs in 1s-Bitrix?

Question

1C-Bitrix

I am new to 1C-Bitrix. The site is running on BitrixVM. There is a 500 error on the site, and I want to know what is the reason. But I can't find the logs. From bitrix/.settings.php:

array (
      'debug' => true,
      'handled_errors_types' => 4437,
      'exception_errors_types' => 4437,
      'ignore_silence' => false,
      'assertion_throws_exception' => true,
      'assertion_error_type' => 256,
      'log' => array (
          'settings' =>
          array (
            'file' => '/var/log/php/exceptions.log',
            'log_size' => 1000000,
        ),
      ),
    ),

it follows that the logs are somewhere in the /var/log/php/ area, but there is no var folder in the file structure of the administrative panel at all! Where to look for default logs? I searched for quite a long time, but could not find any clear information.