Fatal error: Uncaught Error: Failed opening required '/usr/local/apache2/htdocs/drupal-8.6.1/vendor/composer/../../core/includes/bootstrap.inc' (include_path='/usr/local/apache2/htdocs/drupal-8.6.1/vendor/pear/archive_tar:/usr/local/apache2/htdocs/drupal-8.6.1/vendor/pear/console_getopt:/usr/local/apache2/htdocs/drupal-8.6.1/vendor/pear/pear-core-minimal/src:/usr/local/apache2/htdocs/drupal-8.6.1/vendor/pear/pear_exception:.:/usr/local/lib/php') in /usr/local/apache2/htdocs/drupal-8.6.1/vendor/composer/autoload_real.php:45 Stack trace: #0 /usr/local/apache2/htdocs/drupal-8.6.1/vendor/composer/autoload_real.php(49): {closure}('2f69d3914119f04...', '/usr/local/apac...') #1 /usr/local/apache2/htdocs/drupal-8.6.1/vendor/autoload.php(25): ComposerAutoloaderInitDrupal8::getLoader() #2 /usr/local/apache2/htdocs/drupal-8.6.1/autoload.php(16): require('/usr/local/apac...') #3 /usr/local/apache2/htdocs/drupal-8.6.1/index.php(14): require_once('/usr/local/apac...') #4 {main} thrown in /usr/local/apache2/htdocs/drupal-8.6.1/vendor/composer/autoload_real.php on line 45