Redmine

Installed Redmine 2.3 on Ubuntu and when trying to launch http://my.domain.com/redmine I get the following error:

Internal error

An error occurred on the page you were trying to access.
If you continue to experience problems please contact your redMine administrator for assistance.

There were no errors during the installation.
Log file shows:

Processing WelcomeController#index (for xxx.xxx.xxx.xxx at 2013-05-22 14:25:42) [GET]
Parameters: {"controller"=>"welcome", "action"=>"index"}

NoMethodError (undefined method `[]' for nil:NilClass):
/app/models/setting.rb:100:in `value='
/vendor/rails/activerecord/lib/active_record/base.rb:2589:in `send'
/vendor/rails/activerecord/lib/active_record/base.rb:2589:in `attributes='
/vendor/rails/activerecord/lib/active_record/base.rb:2585:in `each'
/vendor/rails/activerecord/lib/active_record/base.rb:2585:in `attributes='
/vendor/rails/activerecord/lib/active_record/base.rb:2285:in `initialize'
/app/models/setting.rb:166:in `new'
/app/models/setting.rb:166:in `find_or_default'
/app/models/setting.rb:107:in `[]'

Appreciate of any help