.. include:: /Includes.rst.txt

==========================
TYPO3 Exception 1533822084
==========================

.. include:: /If-you-encounter-this-exception.rst.txt

Argon2iPasswordHash is not available
====================================

The following exception may bubble up since TYPO3 v9 during login:

::

      #1533822084 TYPO3\CMS\Core\Crypto\PasswordHashing\InvalidPasswordHashException
      Configured default hash method
      TYPO3\CMS\Core\Crypto\PasswordHashing\Argon2iPasswordHash is not
      available. If the instance has just been upgraded, please log in to the
      standalone install tool at typo3/install.php to fix this.

Explanation
===========

If an instance has just been upgraded and if *argon2i* hash mechanism is
not available locally, the default backend will still try to upgrade a
given user password to *argon2i* if the install tool has not been
executed once.

Reasons
=======

This typically happens only if a system has just been upgraded and a
backend login is performed before the install tool has executed silent
upgarde wizards.

Solutions
=========

Please see :ref:`Password hashing troubleshooting
<t3coreapi:password-hashing_troubleshooting>`.

More information
================

-  `Official password hashing documentation since TYPO3
   v9 <https://docs.typo3.org/typo3cms/CoreApiReference/ApiOverview/PasswordHashing/Index.html>`__
-  `Issue explaining the deployment
   problem <https://forge.typo3.org/issues/86155>`__