fix: prevenir doble renderización

closes #15564

app/controllers/application_controller.rb

@@ -77,6 +77,11 @@ class ApplicationController < ActionController::Base
 
   # Muestra una página 404
   def page_not_found
+    self.response_body = nil
+    @_response_body = nil
+
+    headers.delete('Location')
+
     render 'application/page_not_found', status: :not_found
   end