amend method to find the path for the next question to answer so that if no questions in the next section are currently routed to, it goes to the section after that

app/models/form.rb

@@ -111,8 +111,8 @@ class Form
     when :in_progress
       "#{next_subsection.id}/check_answers".dasherize
     when :not_started
-      first_question_in_subsection = next_subsection.pages.find { |page| page.routed_to?(log, nil) }.id
-      first_question_in_subsection.to_s.dasherize
+      first_question_in_subsection = next_subsection.pages.find { |page| page.routed_to?(log, nil) }
+      first_question_in_subsection ? first_question_in_subsection.id.to_s.dasherize : next_incomplete_section_redirect_path(next_subsection, log)
     else
       "error"
     end