Redmine

Hi, I'm having problems with the plugin access_list in redmine 3.4.4. In installed it normally with rake redmine:plugins:migrate NAME=access_tickets RAILS_ENV=production and the scripts in the db/migrate folder (only the scripts started with 100* becuase scripts started with 400* generates duplicates tables).

The error that I get in the log is this:

NoMethodError (undefined method `value' for nil:NilClass):
plugins/access_tickets/app/models/i_ticket.rb:331:in `check_security_officer'
plugins/access_tickets/app/controllers/iaccesses_controller.rb:573:in `accesses_list'
lib/redmine/sudo_mode.rb:63:in `sudo_mode'

Any ideas?