.. include:: /Includes.rst.txt ========================== TYPO3 Exception 1533818591 ========================== .. include:: /If-you-encounter-this-exception.rst.txt InvalidPasswordHashException: No implementation found that handles given hash ============================================================================= The following exception may bubble up since TYPO3 v9 during login: :: #1533818591 TYPO3\CMS\Core\Crypto\PasswordHashing\InvalidPasswordHashException No implementation found that handles given hash. This happens if the stored hash uses a mechanism not supported by current server. Explanation =========== A frontend user, a backend user or the install tool password hash is stored using a mechanism not supported by the current server. The login process can not compare the given password with the stored hash. Reasons ======= This typically happens if a TYPO3 upgrade is performed on a system that supports the default hash mechanism *argon2i*, passwords in the database and/or the install tool password is updated to use this hash, and the system is then deployed to a system that does not support *argon2i*. Solutions ========= Please see :ref:`Password hashing troubleshooting `. More information ================ - `Official password hashing documentation since TYPO3 v9 `__ - `Issue explaining the deployment problem `__