fix

app/controllers/admin/administration/qualiopi/indicators_controller.rb

@@ -6,6 +6,10 @@ class Admin::Administration::Qualiopi::IndicatorsController < Admin::Administrat
   end
 
   def show
+    dir = "admin/administration/qualiopi/evaluations/"
+    file = "#{dir}_criterion_#{@indicator.number}"
+    file_exists = lookup_context.find_all(file).any? 
+    @partial = "#{dir}criterion_#{@indicator.number}" if file_exists
     breadcrumb
   end
 

app/models/concerns/with_inheritance.rb

@@ -23,7 +23,8 @@ module WithInheritance
 
   def best(property)
     value = send(property)
-    text = Static.html_to_text value.to_html
+    text = value.nil? ? '' : value.to_html
+    text = Static.html_to_text text
     text.blank? ? parent&.send("best_#{property}") : value
   end
 

app/views/admin/administration/qualiopi/indicators/show.html.erb

@@ -16,12 +16,4 @@
     <% end %>
   </div>
 </div>
-
-<%
-partial = "admin/administration/qualiopi/evaluations/criterion_#{@indicator.number}"
-# TODO render only if file exists, so we can have errors
-%>
-<% begin %>
-<%= render "admin/administration/qualiopi/evaluations/criterion_#{@indicator.number}" %>
-<% rescue %>
-<% end %>
+<%= render @partial unless @partial.nil? %>