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Latest post by nicholas on Wednesday, 15 October 2025 09:22 CDT
Hello,
I have killed my homepage (schwimmclub-schwandorf.de) after using akeeba backup restoration.
I made a backup (I have downloaded it) and tried to restore the backup.
At first, with akeeba backup pro directly at my side.
Then the first error occured:
Cannot Instantiate Abstract Class Joomla\Module\Login\Administrator\Helper\LoginHelper After that I tried to use kickstart, but without success. I hope someone can assist me and save my homepage...
You are trying to restore an older version of Joomla on top of a new one. As per the documentation:
Do not try to overwrite one Joomla! version family with a different one. Overwriting a major version with another (e.g. restoring a backup taken on Joomla! 3.7 on top of a site running Joomla! 2.5 or vice versa) or between different minor versions (e.g. restoring a backup taken on Joomla! 3.7 on top of a site running Joomla! 3.6 or vice versa) will NOT work. Joomla! moves files around between minor and major versions. Since the backup does not delete files not present in the backup archive this will end up with Joomla! being "confused" and malfunctioning. In these cases you should delete the existing files and folders (except, perhaps, user generated content) before restoring the backup. You can safely restore a sub-minor (path-level) version on top of another. For example, you can safely restore a Joomla! 3.7.5 site on top of a Joomla! 3.7.3 site or vice versa.
Nicholas K. Dionysopoulos
Lead Developer and Director
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