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Latest post by nicholas on Monday, 24 June 2024 00:52 CDT
This pertains to an under-construction site, so support is not urgent.
In Joomla 4, I had to restore from a backup taken a few hours ago.
It seemed to me that I did all the steps done on previous backup-restores.
But when I did, the front end came back, but on the the admin login page, I get this error:
"An error has occurred.
0 Cannot instantiate abstract class Joomla\Module\Login\Administrator\Helper\LoginHelper" and can't log in. Vicki
Did you try to restore the backup on top of a different major Joomla version, e.g. Joomla 5? If that was the case, you need to remove Joomla's core folders before restoring the backup. The core folders are administrator, api, cli, components, includes, language, layouts, libraries, media, modules, plugins, and templates. Remember to keep a copy of your backup archives before removing these folders.
If you were restoring on top of the same Joomla! 4 version then the problem is that there was a bug in one of your extensions or template overrides when you took the backup, you just had not noticed it yet. In this case you can either try restoring an older backup, or troubleshoot the problem by editing your configuration.php file and changing the following lines in it:
public $debug = true;
public $error_reporting = 'maximum';
This will tell you which file and line is causing this problem.
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!
Ah, yes. After taking a backup, I upgraded to Joomla 5, which went smoothly.
I then did a couple of hours of work... but then a crash before I had done another backup (at the Joomla 5 level).
So I just followed your instructions for the first case, and reinstallation all went smoothly.
Thanks a million, Nicholas!
Vicki
You're welcome!
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!
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