I have just upgraded CiviCRM to v5.65.1 in my Joomla site (v4.3.4). Now, since that update I can no longer login to my admin backend - I get the following error displayed: 0 Class "Civi\Core\Container" not found

I have backed up the database files using the function in PHPMyAdmin, but need to rebuild the CiviCRM installation. Looking at the FTP backend, a lot of the CiviCRM files are zero bytes.

How do I restore my installation?

  • I am still trying to get access to my Joomla admin backend to sort this issue out. Can ANYONE here help? Sep 18, 2023 at 11:21
  • You could try deleting the files (perhaps, back them up first just in case, though not sure it'll be of any value), and FTP the appropriate directory/file trees from the unzipped CiviCRM download file into /administrator/components/com_civicrm and into /components/com_civicrm. Please make sure you reinstate backup copies of the /administrator/components/com_civicrm/civicrm_settings.php and /components/com_civicrm/civicrm_settings.php files. The Civi upgrade always overrides them for some odd reason. If you don't have backup copies, you could update the new files manually.
    – MtnPavlas
    Sep 19, 2023 at 12:12
  • See the comment I made yesterday for the solution to my issue. Sep 20, 2023 at 13:25

1 Answer 1


I asked this question on the Joomla forum and was told to set the enabled flag for the CiviCRM apps to zero within phpMyAdmin.

This did work and I was then able to apply the update that failed earlier to CiviCRM.

Maybe this is something that the developers should include in the documentation?

  • Checking I follow correctly: you tried to update (hopefully following docs.civicrm.org/sysadmin/en/latest/upgrade/joomla) but that resulted in zero-byte files and inability to log in. You disabled CiviCRM then updated again and it worked? I'm curious about those zero-byte files. Were you out of disk space?
    – Aidan
    Sep 19, 2023 at 11:52
  • No. I was not out of disk space. IONOS provide unlimited storage space. Previous CiviCRM updates have worked faultlessly. Sep 20, 2023 at 13:23

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