Error on login

[ZleFox]

Hello, We were trying to use only the account lock on wrong passwords feature (would be nice if by default all features are disabled btw). So we have put 0s to disable other policies. Then on login we got internal error:

NoMethodError (undefined method `to_date' for nil:NilClass
Did you mean?  to_a):
  plugins/redmine_account_policy/lib/redmine_account_policy/user_patch.rb:97:in `account_unused?'
  plugins/redmine_account_policy/lib/redmine_account_policy/account_controller_patch.rb:36:in `block in lock_unused_accounts!'
  plugins/redmine_account_policy/lib/redmine_account_policy/account_controller_patch.rb:35:in `lock_unused_accounts!'
  plugins/redmine_account_policy/lib/redmine_account_policy/account_controller_patch.rb:16:in `run_account_policy_daily_tasks'
  plugins/redmine_account_policy/lib/redmine_account_policy/controller_account_success_authentication_after_hook.rb:11:in `controller_account_success_authentication_after'
  lib/redmine/hook.rb:61:in `block (2 levels) in call_hook'
  lib/redmine/hook.rb:61:in `each'
  lib/redmine/hook.rb:61:in `block in call_hook'
  lib/redmine/hook.rb:58:in `tap'
  lib/redmine/hook.rb:58:in `call_hook'
  lib/redmine/hook.rb:91:in `call_hook'
  app/controllers/account_controller.rb:262:in `successful_authentication'
  plugins/redmine_account_policy/lib/redmine_account_policy/account_controller_patch.rb:233:in `successful_authentication_with_account_policy'
  app/controllers/account_controller.rb:203:in `password_authentication'
  plugins/redmine_account_policy/lib/redmine_account_policy/account_controller_patch.rb:163:in `password_authentication_with_account_policy'
  app/controllers/account_controller.rb:189:in `authenticate_user'
  app/controllers/account_controller.rb:40:in `login'
  lib/redmine/sudo_mode.rb:63:in `sudo_mode'
  plugins/redmine_dmsf/lib/redmine_dmsf/webdav/no_parse.rb:33:in `call'

Setting values on the options didn't fix the issue. Only removing the plugin allowed users to login again. Curiously, the plugin have worked correctly right after installation. Can you look into it? Thanks