After some issues with Upgrade to latest stable versions of components I decided to rollback, so I went to System > Tools > Backups and clicked on Rollback of latest System Backup I did before the upgrade. I also did a Database and Media Backup.
Now I get the following error and it seems that a large number of files have disappeared on the server side:
Warning: include_once(Mage/Core/functions.php): failed to open stream: No such file or directory in /var/www/web108/html/www/app/Mage.php on line 50 Warning: include_once(): Failed opening 'Mage/Core/functions.php' for inclusion (include_path='/var/www/web108/html/www/app/code/local:/var/www/web108/html/www/app/code/community:/var/www/web108/html/www/app/code/core:/var/www/web108/html/www/lib:.:/usr/share/php:/usr/share/php/PEAR:/var/www/web108/html') in /var/www/web108/html/www/app/Mage.php on line 50 Warning: include_once(Varien/Autoload.php): failed to open stream: No such file or directory in /var/www/web108/html/www/app/Mage.php on line 51 Warning: include_once(): Failed opening 'Varien/Autoload.php' for inclusion (include_path='/var/www/web108/html/www/app/code/local:/var/www/web108/html/www/app/code/community:/var/www/web108/html/www/app/code/core:/var/www/web108/html/www/lib:.:/usr/share/php:/usr/share/php/PEAR:/var/www/web108/html') in /var/www/web108/html/www/app/Mage.php on line 51 Fatal error: Class 'Varien_Autoload' not found in /var/www/web108/html/www/app/Mage.php on line 54
This is a terrible situation, completely lost here for next steps, any suggestions?