Site Restoration

#36037 Restoration failed error mesage: Joomla\CMS\Encrypt\AES\AbstractAES' not found

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Environment Information

PHP version
CMS Type
CMS Version
Backup Tool Version
Kickstart version

Latest post by wolfmen on Monday, 25 October 2021 03:38 CDT


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Hi Nicholas,

at the end of an restoring-process I get the error message:

Installation von Joomla 4 Version:

Error — Class 'Joomla\CMS\Encrypt\AES\AbstractAES' not found


#0 [...]/installation/platform/models/joomlasetup.php(1020): include_once()
#1 [...]installation/platform/models/joomlasetup.php(945): AngieModelJoomlaSetup->updateTFA()
#2 [...]/installation/platform/models/joomlasetup.php(80): AngieModelJoomlaSetup->updateEncryptedData()
#3[...]/installation/angie/controllers/base/setup.php(23): AngieModelJoomlaSetup->applySettings()
#4 [...]/installation/framework/controller/controller.php(510): AngieControllerBaseSetup->apply()
#5 [...]/installation/framework/dispatcher/dispatcher.php(263): AController->execute()
#6 [...] /installation/framework/application/application.php(176): ADispatcher->dispatch()
#7[...]/installation/index.php(115): AApplication->dispatch()
#8 [...]/installation/index.php(230): mainLoop()
#9 {main}

Do you know what happend and how I can get a solution?

thanks and best regards,


Akeeba Staff

This is a known issue which will be fixed in the next version of Akeeba Backup, to be released tomorrow.

This is caused by using Joomla's Two Factor Authentication in at least one user account and if its Two Factor Configuration appears to be in a format used before Joomla 3.6.4. For what it's worth, even when you will be able to restore that site with Akeeba Backup 9.0.8 you will still be unable to log into the site with this user account since Joomla itself also has the same issue with these old user accounts.

Nicholas K. Dionysopoulos

Lead Developer and Director

🇬🇷Greek: native 🇬🇧English: excellent 🇫🇷French: basic • 🕐 My time zone is Europe / Athens
Please keep in mind my timezone and cultural differences when reading my replies. Thank you!



Thank you for the information. Then I guess the best solution is to recreate the old user accounts?

best regards,


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