Hi Jancity,
You can fix this with a manual upgrade:
1. Extract schlix-cms-v2.1.1-5.zip
2. Copy the file schlix/install/upgrade.php to the site root directory
3. Create a new PHP file with the following content (e.g. manual-upgrade.php)
//===========================
// Content of manual-upgrade.php
//===========================
require('runtime.inc.php');
require('upgrade.php');
error_reporting(E_ALL);
ini_set('display_errors','1');
setupSchlixRuntime();
$db_host = 'localhost';
$db_database = 'your_database_name';
$db_username = 'your_database_username';
$db_password = 'your_database_password';
upgrade_schlix('',$db_host,$db_database,$db_username,$db_password);
4. Change the variable $db_host, $db_database, $db_username, $db_password
to match your site database configuration (you can find it in your subsite
e.g. /web/main/config.inc.php if your subsite name is 'main' (default)
5. Upload both files (upgrade.php and manual-upgrade.php) to the root folder of your site via FTP or SSH
6. Open your web browser and run it
http://www.yoursite.com/manual-upgrade.php
7. Delete both files