If you want to hit the Rasa Open Source server specifically, add /core to the endpoint – so here: https://2286950d1621.jp.ngrok.io/core/model/parse
The /core tells the nginx proxy which service to send your request to. If you want to hit the Rasa X api, you should add /api.
What you are seeing currently is the Rasa X UI response, which is the default container (which is why you can log into the UI on the base url directly)
Thank you @erohmensing. It’s working. I can’t find documentation, do you have any documentation pls share me