Fix wrong route in return

app/modules/vote/app.py

@@ -46,7 +46,7 @@ def view(ballot_id):
                 question = Question.query.get(question_id)
                 if question.has_voten(user_id):
                     flash('Je hebt al gestemd.', 'warning')
-                    return redirect(url_for('backend_backend_vote.view', ballot_id=ballot.id))
+                    return redirect(url_for('vote.view', ballot_id=ballot.id))
 
                 option = question.options.filter(Option.id == option_id).first()