Again, I checked how the plug-in on a new installation of wordpress! and on another server! still not working, the host is localhost.
If you try to change the prefix displays the message:
Fatal error: Call to undefined method mysqli_result :: fetch_all () in / wp-content/plugins/all-in-one-wp-security-and-firewall/admin/wp-security-database-menu.php on line 534
Successful tryin that moved did on an earlier version of the plug – or it could be the cause?
