Support

Thank you for reaching out!

The error message you are seeing means that Joomla's database still has records indicating Admin Tools is installed, but the actual extension files and tables are missing from your site. This happens when the extension's files and tables are deleted directly from the server (for example via FTP or a file manager, and the host-provided phpMyAdmin / Adminer respectively) rather than the extension being properly uninstalled through Joomla's Extension Manager. Joomla is then confused: it tries to run database update queries against tables that no longer exist.

To resolve this, you will need to manually remove the leftover database records before (re-)installing Admin Tools. Please follow these steps:

1. Open your host-provided database management tool (phpMyAdmin, Adminer, or similar).
2. In the #__extensions table (where # is your database table prefix, e.g. jos_extensions), find the row where the element column is com_admintools. Note down the number you see next to the extension_id.
3. Delete the #__extensions table row you found.
4. In the #__schemas table, find and delete the row where the extension_id matches the ID of the row you found in step 2.
5. Once both records are removed, go to Joomla's Extension Manager and install Admin Tools Professional normally.

If you are not comfortable editing the database directly, please ask your hosting provider's support team for assistance — they can do this safely for you.

Once reinstalled correctly, the error should be completely gone. Please let me know if you run into any further issues and I will be happy to help!