Error "Failed opening required bootstrap/../vendor/autoload.php" in Laravel 5

Hello everyone! I'm new to Laravel 5 and PHP. I installed the framework via Composer, but when I try to run the project using `php artisan serve` or simply open it in a browser, I get a fatal error: ``` Fatal error: require(): Failed opening required 'C:\xampp\htdocs\myproject\bootstrap/../vendor/autoload.php' (include_path='C:\xampp\htdocs\myproject\vendor\composer/../../..') in C:\xampp\htdocs\myproject\bootstrap\autoload.php on line 17 ``` Here is the code from the `bootstrap/autoload.php` file (line 17): ```php