RuntimeException: Failed to start the session because headers have already been sent by "/var/www/html/perpustakaan/vendor/composer/autoload_real.php" at line 1. in Symfony\Component\HttpFoundation\Session\Storage\NativeSessionStorage->start() (line 132 of vendor/symfony/http-foundation/Session/Storage/NativeSessionStorage.php).
Symfony\Component\HttpFoundation\Session\Storage\NativeSessionStorage->start() (Line: 162)
Drupal\Core\Session\SessionManager->startNow() (Line: 193)
Drupal\Core\Session\SessionManager->save() (Line: 171)
Symfony\Component\HttpFoundation\Session\Session->save() (Line: 56)
Drupal\Core\StackMiddleware\Session->handle() (Line: 48)
Drupal\Core\StackMiddleware\KernelPreHandle->handle() (Line: 28)
Drupal\Core\StackMiddleware\ContentLength->handle() (Line: 32)
Drupal\big_pipe\StackMiddleware\ContentLength->handle() (Line: 191)
Drupal\page_cache\StackMiddleware\PageCache->fetch() (Line: 128)
Drupal\page_cache\StackMiddleware\PageCache->lookup() (Line: 82)
Drupal\page_cache\StackMiddleware\PageCache->handle() (Line: 48)
Drupal\Core\StackMiddleware\ReverseProxyMiddleware->handle() (Line: 51)
Drupal\Core\StackMiddleware\NegotiationMiddleware->handle() (Line: 36)
Drupal\Core\StackMiddleware\AjaxPageState->handle() (Line: 51)
Drupal\Core\StackMiddleware\StackedHttpKernel->handle() (Line: 741)
Drupal\Core\DrupalKernel->handle() (Line: 19)