Hello Mario,

Thanks for contacting us. This message typically appears when some Joomla core files are missing, corrupted, or an update/restoration did not complete successfully.

Please check the following:

1. If you recently updated Joomla, restore a backup and try the update again.
2. Re-upload a fresh copy of the same Joomla version currently installed on your site, replacing only the Joomla core files (do not overwrite your configuration.php file).
3. Check whether the file /libraries/vendor/composer/installed.php and other Joomla core files are present and not corrupted.
4. Review your hosting error logs to see if any files were deleted or if there were permission issues.
5. If you have a recent backup, restoring the site may be the fastest solution.

If you can provide:

• Your Joomla version
• Whether you recently performed an update, migration, or restore
• The full error message or a screenshot

we can help identify the exact cause.

Best regards

Hi again

I've tried what you suggested, but it's not working. Unfortunately, I didn't back up the website. I manually reinstalled Joomla! 5.4.6, but it's still not working. I checked that all the important files are there, and they're all present. Please help me by checking, as I don't know what else to do.

I am providing you with the requested information. Joomla version 5.4.6 Joomla was automatically updated in May. The only screenshot is the one I already sent you.

I cannot access the Joomla administration panel

I hope you can help me, and thank you in advance.

Mario

Hi edumarinho, If you'll accept help from stranger contact me on temproray email

Ofi Khan, please. I'm getting a response from a stranger offering help, and none of the Joomshaper support team is saying anything. I really need your help with this problem. Thank you.

Mario

Glad to know this.