Error at the end of installation

After almost finishing the installation, but before I saw a screen to give name and password for an administrator, I got the following error message:

Caught Exception in AutoLoader: exception 'Exception' with message 'Couldn't read file contents from "/var/www/web106/html/projectpier/application/models/project_users/base/BaseProjectUser.class.php".' in /var/www/web106/html/projectpier/environment/classes/AutoLoader.class.php:203 Stack trace: #0 /var/www/web106/html/projectpier/environment/classes/AutoLoader.class.php(187): AutoLoader->parseFile('/var/www/web106...') #1 /var/www/web106/html/projectpier/environment/classes/AutoLoader.class.php(181): AutoLoader->parseDir('/var/www/web106...') #2 /var/www/web106/html/projectpier/environment/classes/AutoLoader.class.php(181): AutoLoader->parseDir('/var/www/web106...') #3 /var/www/web106/html/projectpier/environment/classes/AutoLoader.class.php(181): AutoLoader->parseDir('/var/www/web106...') #4 /var/www/web106/html/projectpier/environment/classes/AutoLoader.class.php(125): AutoLoader->parseDir('/var/www/web106...') #5 /var/www/web106/html/projectpier/environment/classes/AutoLoader.class.php(86): AutoLoader->createCache() #6 /var/www/web106/html/projectpier/application/functions.php(33): AutoLoader->loadClass('DB') #7 /var/www/web106/html/projectpier/init.php(98): __autoload('DB') #8 /var/www/web106/html/projectpier/index.php(9): require('/var/www/web106...') #9 {main}

Maybe I'll have to give more directories the permission 777 because on the same server aC is running fine. The webserver is running as "www-data" but the files are owned by "web106". I'll investigate this later and post any information as reply to this issue. However more likely is the following cause:

In order to get aC running, I had to create manually a company and a person according to http://www.activecollab.com/forums/topic/1657/

I just checked the tables and saw that they are still empty. So most likely the installer did not fill in the tables, which might have caused the above error message.