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General Questions/New to Joomla! 5.x • Re: Error "Cannot instantiate abstract class" after Joomla rollback from 5.1.0 to 5.0.3

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I'm still grappling with that stubborn issue on my Joomla. Despite restoring from backups and even attempting a database restore, the error “Cannot instantiate abstract class Joomla\Module\Login\Administrator\Helper\LoginHelper” persists.

Here’s what I’ve tried so far:

- Rolling back to Joomla 5.0.3 by restoring the public_html directory from a zip backup.
- Clearing all data in the tmp and cache directories.
- Deleting /public_html/administrator/cache/autoload_psr4.php file post-update.
- Restoring the database to a pre-5.1.0 update state.

Unfortunately, none of these actions resolved the issue. The error appears every time I attempt to access the backend, preventing login.

If anyone has encountered a similar problem or has suggestions on additional steps I could take to resolve this error, your advice would be greatly appreciated.

Statistics: Posted by mrnordio — Mon May 06, 2024 7:21 pm



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