link_to_label -> Error: nil can't be coerced into Fixnum
Setting: I'm using GitLab Community Edition 8.4.8 and the latest Kanban release (21.11.2016)
Problem: After I created a card in Kanban the issue tracker (in Gitlab) returns an Internal Server Error
Processing by Projects::LabelsController#index as HTML
Parameters: {"namespace_id"=>"A-Z", "project_id"=>"BugList"}
Completed 500 Internal Server Error in 79ms (ActiveRecord: 6.0ms)
ActionView::Template::Error (nil can't be coerced into Fixnum):
1: %li{id: dom_id(label)}
2: = link_to_label(label)
3: .pull-right
4: %strong.append-right-20
5: = link_to_label(label) do
app/helpers/labels_helper.rb:88:in `+'
app/helpers/labels_helper.rb:88:in `text_color_for_bg'
app/helpers/labels_helper.rb:48:in `render_colored_label'
app/helpers/labels_helper.rb:38:in `link_to_label'
app/views/projects/labels/_label.html.haml:2:in `_app_views_projects_labels__label_html_haml__1478602044626880209_73002620'
app/views/projects/labels/index.html.haml:15:in `_app_views_projects_labels_index_html_haml___2840530719851290004_73679840'
Is kanban compatible with my GitLab version? If yes what can I do to fix it ?