Manually creating new category breaks timebank admin

[decentral1se]

• I set locale=NL
• I create a new category on /admin/categories/new
• I reload /offers and see a server error message
• I see the error below in the logs
• I set locale=EN and return /admin/categories/new to see the category name is empty. I fill it in.
• The error goes away

ActionView::Template::Error (undefined method `downcase' for nil:NilClass):
Causes:
NoMethodError (undefined method `downcase' for nil:NilClass)
25:           <li>
26:             <%= link_to "× #{t('global.all')}", base_path, class: "dropdown-item" %>
27:           </li>
28:           <% all_categories.each do |c| %>
29:             <% next if c == @category %>
30:             <li>
31:               <%= link_to "#{base_path}?cat=#{c.id}", class: "dropdown-item" do %>

app/helpers/categories_helper.rb:3:in `block in all_categories'
app/helpers/categories_helper.rb:3:in `sort_by'
app/helpers/categories_helper.rb:3:in `all_categories'
app/views/shared/_post_filters.html.erb:28
app/views/offers/index.html.erb:11

[sseerrggii]

I @decentral1se

Are you up to talk in some moment? I'm worried that you're doing a lot of work and maybe we don't currently have the resources to manage it

My email is my username on github + gmail