Redmine

Hi
1 month ago code review stops working, I can see old reviews but no new ones
no errors in production.log (some parts hidden for privacy with xx)

Started GET "/projects/xx/search?utf8=%E2%9C%93&issues=1&q=5407" for 192.168.xx.xx at 2014-12-05 09:35:17 +0100
Processing by SearchController#index as HTML
  Parameters: {"utf8"=>"✓", "issues"=>"1", "q"=>"5407", "id"=>"xx"}
  Current user: mauro (id=19)
Redirected to http://redmine.xx.xx/issues/5407
Completed 302 Found in 16.6ms (ActiveRecord: 1.2ms)
Started GET "/issues/5407" for 192.168.xx.xx at 2014-12-05 09:35:17 +0100
Processing by IssuesController#show as HTML
  Parameters: {"id"=>"5407"}
  Current user: mauro (id=19)
  Rendered issues/_action_menu.html.erb (5.7ms)
  Rendered plugins/redmine_code_review/app/views/code_review/_issues_show_details_bottom.html.erb (2.8ms)
  Rendered plugins/redmine_release_notes/app/views/issues/_release_notes.html.erb (4.5ms)
  Rendered plugins/redmine_release_notes/app/views/hooks/release_notes/_view_issues_show_description_bottom.html.erb (4.8ms)
  Rendered issue_relations/_form.html.erb (1.4ms)
  Rendered issues/_relations.html.erb (2.3ms)
  Rendered issues/_changesets.html.erb (7.6ms)
  Rendered issues/_history.html.erb (10.2ms)
  Rendered issues/_action_menu.html.erb (2.9ms)
  Rendered issues/_form_custom_fields.html.erb (2.4ms)
  Rendered issues/_attributes.html.erb (31.5ms)
  Rendered issues/_form.html.erb (50.8ms)
  Rendered attachments/_form.html.erb (1.6ms)
  Rendered issues/_edit.html.erb (60.2ms)
  Rendered plugins/redmine_contacts/app/views/contacts_issues/_contacts.html.erb (0.2ms)
  Rendered issues/_sidebar.html.erb (10.9ms)
  Rendered watchers/_watchers.html.erb (2.8ms)
  Rendered issues/show.html.erb within layouts/base (157.7ms)
  Rendered plugins/redmine_code_review/app/views/code_review/_html_header.html.erb (2.4ms)
  Rendered plugins/redmine_code_review/app/views/code_review/_body_bottom.html.erb (0.5ms)
Completed 200 OK in 351.9ms (Views: 176.6ms | ActiveRecord: 14.6ms)

I've updated redmien to 2.6 and plugin to 0.6.3 without success