TYPO3 Exception 1294587486

Note

Below, the TYPO3 community may have provided additional information or solutions for this exception. However, these may or may not apply to your particular case. If you can provide more information, you should come back here and add your experience and solution steps to this issue once you have resolved it.

General TYPO3 troubleshooting tips can be found in the Troubleshooting section in the menu. You can also ask questions and receive support in the TYPO3 Questions category on talk.typo3.org.

To add your experience, click "Edit on GitHub" above and follow the "Edit on GitHub" workflow. Also check out our tip on Coding Style and reST.

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 Admin Tools (Maintenance, Settings, Update, Environment) in Backend.

Solution: uninstall phpmyadmin, delete cookies, re-login