.. include:: /Includes.rst.txt ========================== TYPO3 Exception 1294587486 ========================== .. include:: /If-you-encounter-this-exception.rst.txt TYPO3 9.5.23 and the extension phpmyadmin 5.6.4 result in error message :: Session already started by session_start(). Make sure no installed extension is starting a session in its :file:`ext_localconf.php` or :file:`ext_tables.php`. when logging in to :guilabel:`Admin Tools` (Maintenance, Settings, Update, Environment) in Backend. Solution: uninstall phpmyadmin, delete cookies, re-login