Further updates on this issue:
I removed the data/config.php to restart the installation process.
After specifying the database information I'm getting the following error page:
Type: 256
Message: No such variable in database: default_theme
File: /var/www/crm/include/variables.php
Line=26
error backtrace:
[PHP core called function]
function called: handle_epesi_error
File: /var/www/crm/include/variables.php
line 26
function called: trigger_error
File: /var/www/crm/data/cache/common.php
line 41
function called: get
File: /var/www/crm/data/cache/common.php
line 28
function called: get_default_template
File: /var/www/crm/data/cache/common.php
line 1466
function called: init_smarty
File: /var/www/crm/data/cache/common.php
line 1555
function called: init_tooltip_div
File: /var/www/crm/include/module_manager.php
line 762
function called: require_once
