Adding more questions to questionnaire

Getting Started with Rasa
1

Hi, I am new at rasa and trying to create a questionnaire with multiple choice questions, user inputs (like birthdate) for patients. I have managed to add 3-4 questions and it worked. Then, I am adding one more question which has the same format like others, but after retraining it does not work. What can be the reason and what is the best way to prepare a questionnaire with more than 10 questions and with variety of inputs. Thanks