Cannot see rasa-x UI

I get all the way through a docker-compose install of rasa X - similar to the tutorial on their docs at Docker Compose Installation

I have a ubuntu EC2 running on AWS.

Everything appears to be running in their containers: ubuntu@ip-172-31-24-105:/etc/rasa$ sudo docker ps

CONTAINER ID   IMAGE                       COMMAND                  CREATED          STATUS                    PORTS                                                                                    NAMES
44e7f7076358   nginx:1.19                  "/docker-entrypoint.…"   18 minutes ago   Up 10 minutes             80/tcp, 0.0.0.0:80->8080/tcp, :::80->8080/tcp, 0.0.0.0:443->8443/tcp, :::443->8443/tcp   rasa_nginx_1
2b895917b2e1   rasa/rasa-x-demo:0.38.0     "./entrypoint.sh run…"   18 minutes ago   Up 10 minutes             5055/tcp                                                                                 rasa_app_1
f24c1243d017   rasa/rasa:2.4.0-full        "rasa x --no-prompt …"   18 minutes ago   Up 10 minutes             5005/tcp                                                                                 rasa_rasa-worker_1
e2b65cc0e2e7   rasa/rasa:2.4.0-full        "rasa x --no-prompt …"   18 minutes ago   Up 10 minutes             5005/tcp                                                                                 rasa_rasa-production_1
1d730c27a5cc   rasa/rasa-x:0.39.0          "python -m rasax.com…"   18 minutes ago   Up 10 minutes (healthy)   8000/tcp                                                                                 rasa_db-migration_1
47622c569169   rasa/rasa-x:0.39.0          "/tini -g -- sh -c '…"   18 minutes ago   Up 10 minutes             5002/tcp                                                                                 rasa_rasa-x_1
1d800798ddff   bitnami/postgresql:11.9.0   "/opt/bitnami/script…"   18 minutes ago   Up 10 minutes             5432/tcp                                                                                 rasa_db_1
acf0e0f47ecb   rasa/duckling:0.1.6.5-r0    "duckling-example-ex…"   18 minutes ago   Up 10 minutes             8000/tcp                                                                                 rasa_duckling_1
34245071883b   bitnami/rabbitmq:3.8.14     "/opt/bitnami/script…"   18 minutes ago   Up 10 minutes             4369/tcp, 5671-5672/tcp, 15671-15672/tcp, 25672/tcp                                      rasa_rabbit_1
21e1bd0bedef   bitnami/redis:6.2.1         "/opt/bitnami/script…"   18 minutes ago   Up 10 minutes             6379/tcp                                                                                 rasa_redis_1

But when I go to my public IP http://3.26.27.136 the server doesn’t even respond. I can’t even ping it. It’s like the nginx server isn’t even running (despite the container seemingly being ok)