undefined method `[]' for nil:NilClass

[arturoliveira]

* Invoke redmine:send_reminders_all (first_time)
** Invoke environment (first_time)
** Execute environment
** Execute redmine:send_reminders_all
rake aborted!
undefined method `[]' for nil:NilClass
/usr/share/redmine/vendor/plugins/redmine_reminder/lib/tasks/reminder_all.rake:112:in `reminders_all'
/usr/share/redmine/vendor/plugins/redmine_reminder/lib/tasks/reminder_all.rake:171
/usr/lib/ruby/vendor_ruby/rake/task.rb:205:in `call'
/usr/lib/ruby/vendor_ruby/rake/task.rb:205:in `execute'
/usr/lib/ruby/vendor_ruby/rake/task.rb:200:in `each'
/usr/lib/ruby/vendor_ruby/rake/task.rb:200:in `execute'
/usr/lib/ruby/vendor_ruby/rake/task.rb:158:in `invoke_with_call_chain'
/usr/lib/ruby/1.8/monitor.rb:242:in `synchronize'
/usr/lib/ruby/vendor_ruby/rake/task.rb:151:in `invoke_with_call_chain'
/usr/lib/ruby/vendor_ruby/rake/task.rb:144:in `invoke'
/usr/lib/ruby/vendor_ruby/rake/application.rb:116:in `invoke_task'
/usr/lib/ruby/vendor_ruby/rake/application.rb:94:in `top_level'
/usr/lib/ruby/vendor_ruby/rake/application.rb:94:in `each'
/usr/lib/ruby/vendor_ruby/rake/application.rb:94:in `top_level'
/usr/lib/ruby/vendor_ruby/rake/application.rb:133:in `standard_exception_handling'
/usr/lib/ruby/vendor_ruby/rake/application.rb:88:in `top_level'
/usr/lib/ruby/vendor_ruby/rake/application.rb:66:in `run'
/usr/lib/ruby/vendor_ruby/rake/application.rb:133:in `standard_exception_handling'
/usr/lib/ruby/vendor_ruby/rake/application.rb:63:in `run'
/usr/bin/rake:27
Tasks: TOP => redmine:send_reminders_all

Any sugestions ?