RuntimeException: Failed to start the session because headers have already been sent

Created on 18 December 2021, about 3 years ago
Updated 25 July 2023, over 1 year ago

Hi,
There is no way you can login into your site on Drupal 9.2 and above.
It is somehow related to "session generation".
https://www.drupal.org/project/drupal/releases/9.2.0

Here is longer log:
RuntimeException: Failed to start the session because headers have already been sent by "/[...]/vendor/symfony/http-foundation/Response.php" at line 1239. w Symfony\Component\HttpFoundation\Session\Storage\NativeSessionStorage->start() (line 152 w /[...]/vendor/symfony/http-foundation/Session/Storage/NativeSessionStorage.php)

If I uninstall module everything works perfectly.

🐛 Bug report
Status

Fixed

Version

2.2

Component

Code

Created by

🇵🇱Poland szymmszy Warsaw

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