Use double quotes in controllers/

app/controllers/admin/organizations_controller.rb

@@ -6,14 +6,14 @@ class Admin::OrganizationsController < Admin::BaseController
   def index
     @organizations = @organizations.send(@current_filter)
     @organizations = @organizations.includes(:user)
-                                   .order('users.created_at', :name, 'users.email')
+                                   .order("users.created_at", :name, "users.email")
                                    .page(params[:page])
   end
 
   def search
     @organizations = Organization.includes(:user)
                                  .search(params[:term])
-                                 .order('users.created_at', :name, 'users.email')
+                                 .order("users.created_at", :name, "users.email")
                                  .page(params[:page])
   end
 
@@ -27,4 +27,4 @@ class Admin::OrganizationsController < Admin::BaseController
     redirect_to request.query_parameters.merge(action: :index)
   end
 
-end
+end