Issue with Swagger API

As a part of our project ,we are making a post call to the swagger api (https://generator3.swagger.io/api/generate)
to parse our yaml files to html2.We are currently facing an issue where the information is missing
in the schema's and showing blank.We have tested it in the swagger online editor as well to confirm that its not on our side.
Could you please help us in investigating what is going wrong?I have also attached some screenshots which might be helpful.
Please let me know if you need more details and I can explain by providing an sample yaml file