Unconfirmed employee rights error

Sentry Issue: PROJECT-FORUM-4A

Unconfirmed employee rights use an or in a location where this is not supported. Or can only be used if the joins are equivalent on both sides of the or, which is not the case between ".recurrent" and non recurrent in the current setup. Should be slightly rewritten to joins with course edition first to prevent the structural incompatibility.

ArgumentError: Relation passed to #or must be structurally compatible. Incompatible values: [:joins]
  app/models/ability.rb:147:in `unconfirmed_employee_rights'
    .or(Project.with_role(:client, user).active)
  app/models/ability.rb:135:in `all_abilities'
    unconfirmed_employee_rights(user) if user.has_role?(:unconfirmed_employee, :any)
  app/models/ability.rb:40:in `initialize'
    all_abilities(user)
  app/views/layouts/_navigation_items.html.erb:9:
    <% if can? :index, Course %>
  app/views/layouts/_navigation.html.erb:17:
    <%= render 'layouts/navigation_items' %>
...
(166 additional frame(s) were not displayed)

ActionView::Template::Error: Relation passed to #or must be structurally compatible. Incompatible values: [:joins]